Extra Awesome .NET!!

😎 An awesome collection of .NET related repositories. Like awesome-dotnet but extra!

Using the Github API we put the Github repositories in tables, sorted by the number of stars. In addition to providing links to the repository and the parent organization we provided the number of issues, forks, and the license.

Methodology

This repository was seeded by creating a list of URLS extracted by parsing the markdown file curated by Vitali Fokin using Parakeet.

Table of Contents

• Algorithms and Data structures
• API
• Application Frameworks
• Application Templates
• Artificial Intelligence
• Assembly Manipulation
• Assets
• Authentication and Authorization
• Blazor
• Blockchain
• Build Automation
• Business Intelligence
• Caching
• Calendar
• Chat
• CLI
• CLR
• CMS
• Code Analysis and Metrics
• Compilers, Transpilers and Languages
• Compression
• Cryptography
• Database
• Database Drivers
• Datetime
• Decompilation
• Deployment
• DirectX
• Distributed Computing
• DLR
• Documentation
• E-Commerce and Payments
• Emulators
• Environment Management
• ETL
• Event aggregator and messenger
• Exceptions
• Extensions
• Functional programming
• Game
• GIS
• Git Tools
• Graphics
• GraphQL
• GUI
• HTML and CSS
• HTTP
• IDE
• Image Processing
• Install tools
• Interactive programming
• Internationalization
• Interoperability
• IoC
• JavaScript Engines
• Logging
• Machine Learning and Data Science
• Mail
• Markdown Processors
• Mathematics
• Media
• Metrics
• Micro Framework
• Minification
• Misc
• MVVM
• Networking
• Object to object mapping
• Office
• OpenAI
• ORM
• Other Lists
• Package Management
• Parser Library
• PDF
• Profiler
• Protocols
• Push Notifications
• Queue
• Reactive Programming
• Real-time Communications
• Regular Expression
• RPC
• Scheduling
• SDK and API Clients
• Search
• Serialization
• SMS and Phone calls
• Source Generator
• State machines
• Static Site Generators
• Strong Naming
• Template Engine
• Testing
• Tools
• Trading
• UI Automation
• Visual Studio Plugins
• Web Frameworks
• Web Servers
• WebSocket
• Windows Services
• WPF

Algorithms and Data structures

Name	Owner	Stars	Forks	Issues	License
C-Sharp-Algorithms	aalhour	5799 ⭐	1374 🍴	51 🔨	MIT License
:books: :chart_with_upwards_trend: Plug-and-play class-library project of standard Data Structures and Algorithms in C#
Towel	ZacharyPatten	700 ⭐	52 🍴	10 🔨	MIT License
Throw in the towel.
Algorithmia	SolutionsDesign	522 ⭐	101 🍴	0 🔨	Other
Algorithm and data-structure library for .NET 4.5.2+/Netstandard 2.0+. Algorithmia contains sophisticated algorithms and data-structures like graphs, priority queues, command, undo-redo and more.
Akade.IndexedSet	akade	38 ⭐	3 🍴	6 🔨	MIT License
A convenient data structure supporting efficient in-memory indexing and querying, including range queries and fuzzy string matching.

API

Name	Owner	Stars	Forks	Issues	License
Ocelot	ThreeMammals	8110 ⭐	1618 🍴	130 🔨	MIT License
.NET API Gateway
Nancy	NancyFx	7160 ⭐	1467 🍴	220 🔨	MIT License
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
ServiceStack	ServiceStack	5339 ⭐	1614 🍴	35 🔨	Other
Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
FastEndpoints	FastEndpoints	3829 ⭐	239 🍴	7 🔨	MIT License
A light-weight REST API development framework for ASP.NET 6 and newer.
Telegram.Bot	TelegramBots	2984 ⭐	672 🍴	56 🔨	MIT License
.NET Client for Telegram Bot API
FFImageLoading	luberda-molinet	1406 ⭐	373 🍴	278 🔨	MIT License
Image loading, caching & transforming library for Xamarin and Windows
TLSharp	sochix	1000 ⭐	377 🍴	381 🔨	undefined
Telegram client library implemented in C#
Mobius	microsoft	941 ⭐	212 🍴	54 🔨	MIT License
C# and F# language binding and extensions to Apache Spark
WTelegramClient	wiz0u	817 ⭐	137 🍴	0 🔨	MIT License
Telegram Client API (MTProto) library written 100% in C# and .NET
WebAPIContrib	WebApiContrib	768 ⭐	238 🍴	7 🔨	MIT License
Community Contributions for ASP.NET Web API
Nelibur	Nelibur	128 ⭐	37 🍴	4 🔨	MIT License
Message based webservice framework on the pure WCF
CommandQuery	hlaueriksson	100 ⭐	17 🍴	0 🔨	MIT License
Command Query Separation for 🌐ASP.NET Core ⚡AWS Lambda ⚡Azure Functions ⚡Google Cloud Functions
Storage	managedcode	53 ⭐	14 🍴	32 🔨	MIT License
Storage library provides a universal interface for accessing and manipulating data in different cloud blob storage providers

Application Frameworks

Name	Owner	Stars	Forks	Issues	License
corefx	dotnet	17724 ⭐	4979 🍴	0 🔨	undefined
This repo is used for servicing PR's for .NET Core 2.1 and 3.1. Please visit us at https://github.com/dotnet/runtime
abp	abpframework	12171 ⭐	3297 🍴	535 🔨	GNU Lesser General Public License v3.0
Open Source Web Application Framework for ASP.NET Core. Offers an opinionated architecture to build enterprise software solutions with best practices on top of the .NET and the ASP.NET Core platforms. Provides the fundamental infrastructure, production-ready startup templates, application modules, UI themes, tooling, guides and documentation.
aspnetboilerplate	aspnetboilerplate	11546 ⭐	3757 🍴	175 🔨	MIT License
ASP.NET Boilerplate - Web Application Framework
mono	mono	10820 ⭐	3797 🍴	2248 🔨	Other
Mono open source ECMA CLI, C# and .NET implementation.
orleans	dotnet	9789 ⭐	2009 🍴	503 🔨	MIT License
Cloud Native application framework for .NET
DotNetty	Azure	4006 ⭐	963 🍴	171 🔨	Other
DotNetty project – a port of netty, event-driven asynchronous network application framework
Stl.Fusion	servicetitan	1782 ⭐	107 🍴	5 🔨	MIT License
Build real-time apps (Blazor included) with less than 1% of extra code responsible for real-time updates. Host 10-1000x faster APIs relying on transparent and nearly 100% consistent caching. We call it DREAM, or Distributed REActive Memoization, and it's here to turn real-time on!
AspectCore-Framework	dotnetcore	1653 ⭐	318 🍴	28 🔨	MIT License
AspectCore is an AOP-based cross platform framework for .NET Standard.
csla	MarimerLLC	1210 ⭐	372 🍴	63 🔨	MIT License
A home for your business logic in any .NET application.
spring-net	spring-projects	829 ⭐	370 🍴	8 🔨	Apache License 2.0
Spring Framework for .NET
Framework	Dotnet-Boxed	704 ⭐	75 🍴	29 🔨	MIT License
.NET Core Extensions and Helper NuGet packages.
Peasy.NET	peasy	503 ⭐	66 🍴	0 🔨	MIT License
A business logic micro-framework for .NET and .NET Core
silky	liuhll	270 ⭐	66 🍴	0 🔨	MIT License
The Silky framework is designed to help developers quickly build a microservice development framework through simple code and configuration under the .net platform.
Newbe.Claptrap	newbe36524	214 ⭐	37 🍴	1 🔨	MIT License
This is a frameworks with reactive, event sourcing and Actor pattern as basic theories. On top of this, developers can create "distributed", "scale out", and "easy to test" application more simply. Claptrap and it`s Minions is on the way.
mono-addins	mono	162 ⭐	92 🍴	41 🔨	MIT License
Mono.Addins is a generic framework for creating extensible applications, and for creating add-ins which extend those applications.
Stl.Fusion.Samples	servicetitan	158 ⭐	33 🍴	2 🔨	MIT License
A collection of samples for Fusion library: https://github.com/servicetitan/Stl.Fusion
BoardGames	alexyakunin	69 ⭐	8 🍴	2 🔨	MIT License
New Stl.Fusion sample and a fully functional web app allowing you to play real-time multiplayer board games. Powered by Stl.Fusion, Blazor, and .NET 5.
Plastic	sang-hyeon	54 ⭐	3 🍴	0 🔨	MIT License
This project provides encapsulation of things like Domain, Application Rules, Business Rules or Business Logic in Application.
Signals	EmitKnowledge	51 ⭐	8 🍴	2 🔨	MIT License
Signals is a framework for developing enterprise and SaaS applications that follows the USE-CASE driven methodology
hop-framework	DiegoTondim	49 ⭐	5 🍴	3 🔨	GNU General Public License v3.0
Domain Driven Design, Microservices, .Net 5.

Application Templates

Name	Owner	Stars	Forks	Issues	License
Templates	Dotnet-Boxed	3316 ⭐	485 🍴	47 🔨	MIT License
.NET project templates with batteries included, providing the minimum amount of code required to get you going faster.
Serenity	serenity-is	2545 ⭐	791 🍴	2 🔨	MIT License
Business Apps Made Simple with Asp.Net Core MVC / TypeScript
Template10	Windows-XAML	1409 ⭐	400 🍴	27 🔨	Apache License 2.0
Making Windows 10 apps great again
aspnet-starter-kit	kriasoft	1157 ⭐	206 🍴	43 🔨	MIT License
Cross-platform web development with Visual Studio Code, C#, F#, JavaScript, ASP.NET Core, EF Core, React (ReactJS), Redux, Babel. Single-page application boilerplate.
side-waffle	ligershark	656 ⭐	206 🍴	35 🔨	Other
A collection of Item- and Project Templates for Visual Studio
ProjectScaffold	fsprojects	514 ⭐	158 🍴	64 🔨	The Unlicense
A prototypical .NET solution (file system layout and tooling), recommended for F# projects
Nucleus	alirizaadiyahsi	355 ⭐	88 🍴	7 🔨	MIT License
Vue startup application template that uses ASP.NET Core API layered architecture at the back-end and JWT based authentication
jhipster-dotnetcore	jhipster	303 ⭐	91 🍴	43 🔨	Apache License 2.0
JHipster.NET blueprint

Artificial Intelligence

Name	Owner	Stars	Forks	Issues	License
LLamaSharp	SciSharp	1775 ⭐	237 🍴	88 🔨	MIT License
A cross-platform library to run 🦙LLaMA/LLaVA model (and others) on your local device efficiently.
Mpt-Instruct-DotNet-S	NethermindEth	10 ⭐	2 🍴	0 🔨	Apache License 2.0
Training and Evaluation code for DotNet focused LLM (based on mosaicml/mpt-7b-instruct)

Assembly Manipulation

Name	Owner	Stars	Forks	Issues	License
Fody	Fody	4218 ⭐	451 🍴	5 🔨	MIT License
Extensible tool for weaving .net assemblies
cecil	jbevain	2643 ⭐	608 🍴	100 🔨	MIT License
Cecil is a library to inspect, modify and create .NET programs and libraries.
il-repack	gluck	1082 ⭐	209 🍴	33 🔨	Apache License 2.0
Open-source alternative to ILMerge

Assets

Name	Owner	Stars	Forks	Issues	License
cassette	andrewdavey	536 ⭐	144 🍴	128 🔨	MIT License
Manages .NET web application assets (scripts, css and templates)
SquishIt	jetheredge	459 ⭐	120 🍴	48 🔨	MIT License
Lets you *easily* bundle some css and javascript! Check out the Google group if you have questions!
Bundler	ServiceStack	263 ⭐	61 🍴	6 🔨	Other
Compile & Minify Less/Sass/Stylus/Css/JS/CoffeeScript/LiveScript files. Integrates with MVC and ServiceStack
BundleTransformer	Taritsyn	128 ⭐	20 🍴	4 🔨	Apache License 2.0
Bundle Transformer - a modular extension for System.Web.Optimization (also known as the Microsoft ASP.NET Web Optimization Framework).
NodeAssets	ajorkowski	23 ⭐	1 🍴	5 🔨	undefined
Asset Manager for .net that has live css updates using SignalR and can optionally leverage NodeJS compilers

Authentication and Authorization

Name	Owner	Stars	Forks	Issues	License
openiddict-core	openiddict	4052 ⭐	474 🍴	13 🔨	Apache License 2.0
Flexible and versatile OAuth 2.0/OpenID Connect stack for .NET
hawk	mozilla	1903 ⭐	164 🍴	0 🔨	Other
INACTIVE - HTTP Holder-Of-Key Authentication Scheme
AspNetSaml	jitbit	338 ⭐	113 🍴	4 🔨	Apache License 2.0
Very simple SAML 2.0 consumer module for ASP.NET/C#

Blazor

Name	Owner	Stars	Forks	Issues	License
ant-design-blazor	ant-design-blazor	5509 ⭐	976 🍴	347 🔨	MIT License
🌈A set of enterprise-class UI components based on Ant Design and Blazor WebAssembly.
Blazorise	Megabit	3103 ⭐	504 🍴	372 🔨	Other
Blazorise is a component library built on top of Blazor with support for CSS frameworks like Bootstrap, Tailwind, Bulma, AntDesign, and Material.
BootstrapBlazor	dotnetcore	1725 ⭐	252 🍴	0 🔨	Apache License 2.0
A set of enterprise-class UI components based on Bootstrap and Blazor
MASA.Blazor	masastack	1074 ⭐	144 🍴	117 🔨	MIT License
Blazor UI component library based on Material Design. Support Blazor Server, Blazor WebAssembly and MAUI Blazor.
blazork8s	weibaohui	125 ⭐	5 🍴	0 🔨	MIT License
manage k8s using c# blazor enhance by chatgpt ,try something new ！使用blazor技术开发的内置OpenAI GPT的k8s 管理界面

Blockchain

Name	Owner	Stars	Forks	Issues	License
nethermind	NethermindEth	1106 ⭐	361 🍴	534 🔨	GNU General Public License v3.0
A robust execution client for Ethereum node operators.

Build Automation

Name	Owner	Stars	Forks	Issues	License
msbuild	dotnet	5123 ⭐	1326 🍴	1379 🔨	MIT License
The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio.
cake	cake-build	3802 ⭐	716 🍴	258 🔨	MIT License
:cake: Cake (C# Make) is a cross platform build automation system.
nuke	nuke-build	2459 ⭐	335 🍴	71 🔨	MIT License
🏗 The AKEless Build System for C#/.NET
psake	psake	1541 ⭐	272 🍴	45 🔨	MIT License
A build automation tool written in PowerShell
FAKE	fsprojects	1273 ⭐	581 🍴	38 🔨	Other
FAKE - F# Make
FlubuCore	dotnetcore	891 ⭐	101 🍴	28 🔨	MIT License
A cross platform build and deployment automation system for building projects and executing deployment scripts using C# code.
Invoke-Build	nightroman	609 ⭐	61 🍴	0 🔨	Apache License 2.0
Build Automation in PowerShell
Nake	yevhen	224 ⭐	22 🍴	12 🔨	Other
Magic script-based C# task runner for .NET Core
ModularPipelines	thomhurst	158 ⭐	4 🍴	6 🔨	MIT License
Write your pipelines in C# !

Business Intelligence

Name	Owner	Stars	Forks	Issues	License
FastReport	FastReports	2539 ⭐	564 🍴	19 🔨	MIT License
Free Open Source Reporting tool for .NET6/.NET Core/.NET Framework that helps your application generate document-like reports

Caching

Name	Owner	Stars	Forks	Issues	License
Akavache	reactiveui	2410 ⭐	289 🍴	85 🔨	MIT License
An asynchronous, persistent key-value store created for writing desktop and mobile applications, based on SQLite3. Akavache is great for both storing important data as well as cached local data that expires.
CacheManager	MichaCo	2316 ⭐	455 🍴	69 🔨	Apache License 2.0
CacheManager is an open source caching abstraction layer for .NET written in C#. It supports various cache providers and implements many advanced features.
Foundatio	FoundatioFx	1905 ⭐	239 🍴	28 🔨	Apache License 2.0
Pluggable foundation blocks for building distributed apps.
EasyCaching	dotnetcore	1828 ⭐	314 🍴	32 🔨	MIT License
:boom: EasyCaching is an open source caching library that contains basic usages and some advanced usages of caching which can help us to handle caching more easier!
LazyCache	alastairtree	1687 ⭐	156 🍴	57 🔨	MIT License
An easy to use thread safe in-memory caching service with a simple developer friendly API for c#
FusionCache	ZiggyCreatures	1189 ⭐	63 🍴	12 🔨	MIT License
FusionCache is an easy to use, fast and robust cache with advanced resiliency features and an optional distributed 2nd level.
CacheCow	aliostad	841 ⭐	176 🍴	8 🔨	MIT License
An implementation of HTTP Caching in .NET Core and 4.5.2+ for both the client and the server
CacheTower	TurnerSoftware	576 ⭐	28 🍴	31 🔨	MIT License
An efficient multi-layered caching system for .NET
FastCache	jitbit	98 ⭐	10 🍴	2 🔨	MIT License
7x-10x faster alternative to MemoryCache. A high-performance, lighweight (8KB dll) and thread-safe memory cache for .NET.
Cashew	joakimskoog	83 ⭐	10 🍴	6 🔨	MIT License
A simple and elegant yet powerful HTTP client cache for .NET

Calendar

Name	Owner	Stars	Forks	Issues	License
ical.net	rianjs	753 ⭐	226 🍴	176 🔨	MIT License
ical.NET - an open source iCal library for .NET

Chat

Name	Owner	Stars	Forks	Issues	License
stream-chat-net	GetStream	54 ⭐	12 🍴	2 🔨	Other
Stream Chat official .NET API Client

CLI

Name	Owner	Stars	Forks	Issues	License
Terminal.Gui	gui-cs	9053 ⭐	658 🍴	181 🔨	MIT License
Cross Platform Terminal UI toolkit for .NET
spectre.console	spectreconsole	8474 ⭐	430 🍴	188 🔨	MIT License
A .NET library that makes it easier to create beautiful console applications.
commandline	commandlineparser	4377 ⭐	467 🍴	310 🔨	MIT License
The best C# command line parser that brings standardized *nix getopt style, for .NET. Includes F# support
CliWrap	Tyrrrz	4093 ⭐	254 🍴	3 🔨	MIT License
Library for running command-line processes
CommandLineUtils	natemcmaster	2159 ⭐	254 🍴	10 🔨	Apache License 2.0
Command line parsing and utilities for .NET
CliFx	Tyrrrz	1414 ⭐	60 🍴	4 🔨	MIT License
Class-first framework for building command-line interfaces
Colorful.Console	tomakita	1278 ⭐	123 🍴	30 🔨	MIT License
Style your .NET console output!
readline	tonerdo	799 ⭐	80 🍴	24 🔨	MIT License
A Pure C# GNU-Readline like library for .NET/.NET Core
PowerArgs	adamabdelhamed	559 ⭐	55 🍴	21 🔨	MIT License
The ultimate .NET Standard command line argument parser
commanddotnet	bilal-fazlani	549 ⭐	32 🍴	15 🔨	MIT License
A modern framework for building modern CLI apps
fluent-command-line-parser	fclp	526 ⭐	84 🍴	54 🔨	Other
A simple, strongly typed .NET C# command line parser library using a fluent easy to use interface
Argu	fsprojects	432 ⭐	74 🍴	22 🔨	MIT License
A declarative CLI argument parser for F#
CsConsoleFormat	Athari	363 ⭐	32 🍴	20 🔨	Other
.NET C# library for advanced formatting of console output [Apache]
docopt.net	docopt	347 ⭐	33 🍴	9 🔨	Other
Port of docopt to .net
Typin	adambajguz	239 ⭐	13 🍴	37 🔨	Other
Declarative framework for interactive CLI applications
EntryPoint	Nick-Lucas	137 ⭐	6 🍴	3 🔨	MIT License
Composable CLI Argument Parser for all modern .Net platforms.
clipr	nemec	89 ⭐	9 🍴	11 🔨	MIT License
Command Line Interface ParseR for .Net
SharpNetSH	rpetz	71 ⭐	17 🍴	6 🔨	MIT License
A simple netsh library for C#
RunInfoBuilder	rushfive	42 ⭐	2 🍴	0 🔨	MIT License
A unique command line parser for .NET that utilizes object trees for commands.
JustCli	jden123	28 ⭐	0 🍴	2 🔨	MIT License
Just a quick way to create your own command line tool

CLR

Name	Owner	Stars	Forks	Issues	License
runtime	dotnet	13966 ⭐	4372 🍴	9137 🔨	MIT License
.NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.

CMS

Name	Owner	Stars	Forks	Issues	License
Umbraco-CMS	umbraco	4250 ⭐	2621 🍴	449 🔨	MIT License
The simple, flexible and friendly ASP.NET CMS used by more than 730.000 websites
Orchard	OrchardCMS	2362 ⭐	1121 🍴	1897 🔨	BSD 3-Clause "New" or "Revised" License
Orchard is a free, open source, community-focused Content Management System built on the ASP.NET MVC platform.
squidex	Squidex	2154 ⭐	429 🍴	0 🔨	MIT License
Headless CMS and Content Managment Hub
piranha.core	PiranhaCMS	1895 ⭐	538 🍴	99 🔨	MIT License
Piranha CMS is the friendly editor-focused CMS for .NET that can be used both as an integrated CMS or as a headless API.
BlogEngine.NET	BlogEngine	946 ⭐	536 🍴	27 🔨	undefined
Multi-User ASP.NET Blogging Application
n2cms	n2cms	363 ⭐	195 🍴	162 🔨	Other
N2 CMS, an open source CMS for ASP.NET
C1-CMS-Foundation	Orckestra	253 ⭐	108 🍴	254 🔨	Other
C1 CMS Foundation - .NET based, open source and a bundle of joy!
mojoportal	i7MEDIA	190 ⭐	99 🍴	84 🔨	Other
mojoPortal is an extensible, cross database, mobile friendly, web content management system (CMS) and web application framework written in C# ASP.NET.

Code Analysis and Metrics

Name	Owner	Stars	Forks	Issues	License
BenchmarkDotNet	dotnet	9968 ⭐	935 🍴	222 🔨	MIT License
Powerful .NET library for benchmarking
AppMetrics	AppMetrics	2206 ⭐	284 🍴	102 🔨	Apache License 2.0
App Metrics is an open-source and cross-platform .NET library used to record and report metrics within an application.
roslyn-analyzers	dotnet	1516 ⭐	452 🍴	897 🔨	MIT License
Metrics.NET	Recognos	641 ⭐	108 🍴	44 🔨	Apache License 2.0
The Metrics.NET library provides a way of instrumenting applications with custom metrics (timers, histograms, counters etc) that can be reported in various ways and can provide insights on what is happening inside a running application.
NsDepCop	realvizu	177 ⭐	28 🍴	12 🔨	GNU General Public License v2.0
NsDepCop is a static code analysis tool that helps to enforce namespace dependency rules in C# projects. No more unplanned or unnoticed dependencies in your system.
gendarme	spouliot	78 ⭐	4 🍴	9 🔨	undefined
Gendarme is a extensible rule-based tool to find problems in .NET applications and libraries. Gendarme inspects programs and libraries that contain code in ECMA CIL format (Mono and .NET) and looks for common problems with the code, problems that compiler do not typically check or have not historically checked.
WebBen	omerfarukz	10 ⭐	0 🍴	0 🔨	Apache License 2.0
Cross platform HTTP server benchmark tool
aspnet-metrics	alhardy	9 ⭐	3 🍴	0 🔨	Apache License 2.0
No longer maintained, instead see - https://github.com/alhardy/AppMetrics/

Compilers, Transpilers and Languages

Name	Owner	Stars	Forks	Issues	License
roslyn	dotnet	18426 ⭐	3926 🍴	9054 🔨	MIT License
The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.
Harmony	pardeike	4790 ⭐	466 🍴	8 🔨	MIT License
A library for patching, replacing and decorating .NET and Mono methods during runtime
fsharp	dotnet	3739 ⭐	746 🍴	1157 🔨	MIT License
The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio
P	p-org	2896 ⭐	165 🍴	6 🔨	MIT License
The P programming language.
Fable	fable-compiler	2810 ⭐	291 🍴	190 🔨	MIT License
F# to JavaScript, TypeScript, Python, Rust and Dart Compiler
peachpie	peachpiecompiler	2271 ⭐	197 🍴	92 🔨	Apache License 2.0
PeachPie - the PHP compiler and runtime for .NET and .NET Core
JSIL	sq	1725 ⭐	276 🍴	381 🔨	Other
CIL to Javascript Compiler
clojure-clr	clojure	1538 ⭐	158 🍴	1 🔨	undefined
A port of Clojure to the CLR, part of the Clojure project
ironpython2	IronLanguages	1061 ⭐	228 🍴	212 🔨	Apache License 2.0
Implementation of the Python programming language for .NET Framework; built on top of the Dynamic Language Runtime (DLR).
Netjs	praeclarum	960 ⭐	134 🍴	29 🔨	MIT License
Compile .NET assemblies to TypeScript and JavaScript
roslyn-linq-rewrite	antiufo	716 ⭐	31 🍴	18 🔨	MIT License
Compiles C# code by first rewriting the syntax trees of LINQ expressions using plain procedural code, minimizing allocations and dynamic dispatch.
nemerle	rsdn	615 ⭐	89 🍴	228 🔨	Other
Nemerle language. Main repository.
LinqOptimizer	nessos	473 ⭐	45 🍴	7 🔨	Other
An automatic query optimizer-compiler for Sequential and Parallel LINQ.
IronScheme	IronScheme	361 ⭐	41 🍴	27 🔨	Other
IronScheme
Mond	Rohansi	344 ⭐	23 🍴	9 🔨	MIT License
A scripting language for .NET Core
Testura.Code	Testura	290 ⭐	29 🍴	18 🔨	MIT License
Testura.Code is a wrapper around the Roslyn API and used for generation, saving and compiling C# code. It provides methods and helpers to generate classes, methods, statements and expressions.
Amplifier.NET	deepakkumar1984	167 ⭐	20 🍴	6 🔨	MIT License
Amplifier allows .NET developers to easily run complex applications with intensive mathematical computation on Intel CPU/GPU, NVIDIA, AMD without writing any additional C kernel code. Write your function in .NET and Amplifier will take care of running it on your favorite hardware.
mono-basic	mono	104 ⭐	58 🍴	49 🔨	Other
Visual Basic Compiler and Runtime

Compression

Name	Owner	Stars	Forks	Issues	License
sharpcompress	adamhathcock	2171 ⭐	470 🍴	264 🔨	MIT License
SharpCompress is a fully managed C# library to deal with many compression types and formats.
DotNetZip.Semverd	haf	541 ⭐	215 🍴	109 🔨	Other
A fork of the DotNetZip project without signing with a solution that compiles cleanly. This project aims to follow semver to avoid versioning conflicts. DotNetZip is a FAST, FREE class library and toolset for manipulating zip files. Use VB, C# or any .NET language to easily create, extract, or update zip files.
Snappy.Sharp	jeffesp	138 ⭐	31 🍴	4 🔨	Apache License 2.0
An implementation of google's Snappy compression format in C#

Cryptography

Name	Owner	Stars	Forks	Issues	License
SecurityDriven.Inferno	sdrapkin	565 ⭐	50 🍴	5 🔨	Other
:white_check_mark: .NET crypto done right. Professionally audited.
Pkcs11Interop	Pkcs11Interop	247 ⭐	86 🍴	26 🔨	Apache License 2.0
Managed .NET wrapper for unmanaged PKCS#11 libraries
StreamCryptor	bitbeans	130 ⭐	31 🍴	2 🔨	MIT License
Stream encryption & decryption with libsodium and protobuf
CryptoNet	maythamfahmi	87 ⭐	18 🍴	2 🔨	MIT License
CryptoNet is simple, fast and a lightweight asymmetric and symmetric encryption library.
paseto-dotnet	daviddesmet	81 ⭐	7 🍴	20 🔨	MIT License
🔑 Paseto.NET, a Paseto (Platform-Agnostic Security Tokens) implementation for .NET
NaCl.Core	daviddesmet	69 ⭐	7 🍴	14 🔨	MIT License
🔑 NaCl.Core, a cryptography library for .NET

Database

Name	Owner	Stars	Forks	Issues	License
LiteDB	mbdavid	8172 ⭐	1196 🍴	705 🔨	MIT License
LiteDB - A .NET NoSQL Document Store in a single data file
EventStore	EventStore	5060 ⭐	633 🍴	147 🔨	Other
EventStoreDB, the event-native database. Designed for Event Sourcing, Event-Driven, and Microservices architectures
ignite	apache	4672 ⭐	1882 🍴	737 🔨	Apache License 2.0
Apache Ignite
ravendb	ravendb	3430 ⭐	816 🍴	81 🔨	Other
ACID Document Database
marten	JasperFx	2650 ⭐	414 🍴	67 🔨	MIT License
.NET Transactional Document DB and Event Store on PostgreSQL
realm-dotnet	realm	1207 ⭐	164 🍴	143 🔨	Apache License 2.0
Realm is a mobile database: a replacement for SQLite & ORMs
yessql	sebastienros	1149 ⭐	191 🍴	134 🔨	MIT License
A .NET document database working on any RDBMS
DBreeze	hhblaze	505 ⭐	59 🍴	1 🔨	BSD 2-Clause "Simplified" License
C# .NET NOSQL ( key value store embedded ) ACID multi-paradigm database management system.
BrightstarDB	BrightstarDB	459 ⭐	81 🍴	56 🔨	MIT License
This is the core development repository for BrightstarDB.
json-flatfile-datastore	ttu	411 ⭐	60 🍴	11 🔨	MIT License
Simple JSON flat file data store with support for typed and dynamic data.
Streamstone	yevhen	386 ⭐	64 🍴	2 🔨	Other
Event store for Azure Table Storage
ZoneTree	koculu	264 ⭐	25 🍴	0 🔨	MIT License
ZoneTree is a persistent, high-performance, transactional, ACID-compliant ordered key-value database for NET. It can operate in memory or on local/cloud storage.
rocksdb-sharp	curiosity-ai	147 ⭐	38 🍴	10 🔨	BSD 2-Clause "Simplified" License
.net bindings for the rocksdb by facebook
SliccDB	pmikstacki	118 ⭐	14 🍴	1 🔨	MIT License
Light Embedded Graph Database for .net
StringDB	monoclex	71 ⭐	12 🍴	3 🔨	MIT License
StringDB is a modular, key/value pair archival DB designed to consume *tiny* amounts of ram & produce *tiny* databases.
db4o-gpl	iboxdb	30 ⭐	8 🍴	1 🔨	undefined
new Db4o GPL Source Code for Java7+ & .netstardard2.0 Android Xamarin..., the best database project to help you to learn how to make databases

Database Drivers

Name	Owner	Stars	Forks	Issues	License
StackExchange.Redis	StackExchange	5779 ⭐	1486 🍴	200 🔨	Other
General purpose redis client
npgsql	npgsql	3139 ⭐	807 🍴	237 🔨	PostgreSQL License
Npgsql is the .NET data provider for PostgreSQL.
mongo-csharp-driver	mongodb	3096 ⭐	1235 🍴	29 🔨	Apache License 2.0
The Official C# .NET Driver for MongoDB
ServiceStack.Redis	ServiceStack	2294 ⭐	876 🍴	17 🔨	Other
.NET's leading C# Redis Client
csharp-driver	datastax	621 ⭐	228 🍴	3 🔨	Apache License 2.0
DataStax C# Driver for Apache Cassandra
couchbase-net-client	couchbase	272 ⭐	248 🍴	0 🔨	Apache License 2.0
The official Couchbase SDK for .NET Core and Full Frameworks
FluentStorage	robinrodricks	192 ⭐	27 🍴	32 🔨	MIT License
A polycloud .NET cloud storage abstraction layer. Provides Blob storage (AWS S3, GCP, FTP, SFTP, Azure Blob/File/Event Hub/Data Lake) and Messaging (AWS SQS, Azure Queue/ServiceBus). Supports .NET 5+ and .NET Standard 2.0+. Pure C#.
stowage	aloneguid	156 ⭐	11 🍴	1 🔨	Apache License 2.0
Bloat-free, no BS cloud storage SDK.

Datetime

Name	Owner	Stars	Forks	Issues	License
nodatime	nodatime	2654 ⭐	323 🍴	33 🔨	Apache License 2.0
A better date and time API for .NET
DateTimeExtensions	joaomatossilva	608 ⭐	230 🍴	7 🔨	Other
This project is a merge of several common DateTime operations on the form of extensions to System.DateTime, including natural date difference text (precise and human rounded), holidays and working days calculations on several culture locales.
Exceptionless.DateTimeExtensions	exceptionless	231 ⭐	27 🍴	2 🔨	Apache License 2.0
DateTimeRange, Business Day and various DateTime, DateTimeOffset, TimeSpan extension methods

Decompilation

Name	Owner	Stars	Forks	Issues	License
dnSpy	dnSpy	25341 ⭐	4875 🍴	185 🔨	undefined
.NET debugger and assembly editor

Deployment

Name	Owner	Stars	Forks	Issues	License
DbUp	DbUp	2079 ⭐	528 🍴	95 🔨	MIT License
DbUp is a .NET library that helps you to deploy changes to SQL Server databases. It tracks which SQL scripts have been run already, and runs the change scripts that are needed to get your database up to date.
yuniql	rdagumampan	408 ⭐	63 🍴	107 🔨	Apache License 2.0
Free and open source schema versioning and database migration made natively with .NET/6. NEW THIS MAY 2022! v1.3.15 released!
OctoPack	OctopusDeploy	183 ⭐	96 🍴	19 🔨	Other
Creates Octopus-compatible NuGet packages
unfold	thomasvm	137 ⭐	16 🍴	2 🔨	undefined
Powershell-based deployment solution for .net web applications

DirectX

Name	Owner	Stars	Forks	Issues	License
Vortice.Windows	amerkoleci	944 ⭐	68 🍴	2 🔨	MIT License
.NET bindings for Direct3D12, Direct3D11, WIC, Direct2D1, XInput, XAudio, X3DAudio, DXC, Direct3D9 and DirectInput.

Distributed Computing

Name	Owner	Stars	Forks	Issues	License
orleans	dotnet	9789 ⭐	2009 🍴	503 🔨	MIT License
Cloud Native application framework for .NET
akka.net	akkadotnet	4603 ⭐	1036 🍴	401 🔨	Other
Canonical actor model implementation for .NET with local + distributed actors in C# and F#.
Foundatio	FoundatioFx	1905 ⭐	239 🍴	28 🔨	Apache License 2.0
Pluggable foundation blocks for building distributed apps.
protoactor-dotnet	asynkron	1652 ⭐	286 🍴	86 🔨	Apache License 2.0
Proto Actor - Ultra fast distributed actors for Go, C# and Java/Kotlin
dotNext	dotnet	1506 ⭐	118 🍴	3 🔨	MIT License
Next generation API for .NET
Orleankka	OrleansContrib	485 ⭐	78 🍴	4 🔨	Apache License 2.0
Functional API for Microsoft Orleans http://orleanscontrib.github.io/Orleankka
Zebus	Abc-Arbitrage	297 ⭐	60 🍴	7 🔨	MIT License
A lightweight Peer to Peer Service Bus
FsShelter	Prolucid	1 ⭐	1 🍴	0 🔨	Other
Author Apache Storm topologies with F# using statically-typed streams

DLR

Name	Owner	Stars	Forks	Issues	License
cmd	manojlds	351 ⭐	48 🍴	4 🔨	Apache License 2.0
C# library to run external programs in a simpler way. Demonstration of "dynamic" features of C#.

Documentation

Name	Owner	Stars	Forks	Issues	License
docfx	dotnet	3861 ⭐	830 🍴	296 🔨	MIT License
Static site generator for .NET API documentation.
Swashbuckle.WebApi	domaindrivendev	3060 ⭐	679 🍴	358 🔨	BSD 3-Clause "New" or "Revised" License
Seamlessly adds a swagger to WebApi projects!
SHFB	EWSoftware	2164 ⭐	364 🍴	18 🔨	Other
Sandcastle Help File Builder (SHFB). A standalone GUI, Visual Studio integration package, and MSBuild tasks providing full configuration and extensibility for building help files with the Sandcastle tools.
SourceBrowser	KirillOsenkov	1031 ⭐	199 🍴	47 🔨	Apache License 2.0
Source browser website generator that powers http://referencesource.microsoft.com and http://sourceroslyn.io
DocNet	FransBouma	244 ⭐	36 🍴	10 🔨	undefined
Your friendly static documentation generator, using markdown files to build the content.

E-Commerce and Payments

Name	Owner	Stars	Forks	Issues	License
nopCommerce	nopSolutions	8874 ⭐	5051 🍴	116 🔨	Other
ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.
SimplCommerce	simplcommerce	4101 ⭐	1535 🍴	160 🔨	Apache License 2.0
A simple, cross platform, modulith ecommerce system built on .NET
stripe-dotnet	stripe	1317 ⭐	565 🍴	18 🔨	Apache License 2.0
Stripe.net is a sync/async .NET 4.6.1+ client, and a portable class library for stripe.com.
vc-platform	VirtoCommerce	1197 ⭐	847 🍴	54 🔨	Other
Virto Commerce Platform Repository
Smartstore	smartstore	1047 ⭐	377 🍴	524 🔨	GNU Affero General Public License v3.0
A modular, scalable and ultra-fast open-source all-in-one eCommerce platform built on ASP.NET Core 7
grandnode2	grandnode	977 ⭐	408 🍴	95 🔨	GNU General Public License v3.0
Open-Source eCommerce Platform on .NET Core, MongoDB, AWS DocumentDB, Azure CosmosDB, LiteDB & Vue.js
Stripe	ServiceStack	193 ⭐	67 🍴	3 🔨	Other
Typed .NET clients for stripe.com REST APIs
adyen-dotnet-api-library	Adyen	99 ⭐	109 🍴	6 🔨	MIT License
Adyen API Library for .NET

Emulators

Name	Owner	Stars	Forks	Issues	License
Ryujinx	Ryujinx	31758 ⭐	3692 🍴	814 🔨	MIT License
Experimental Nintendo Switch Emulator written in C#
BizHawk	TASEmulators	1987 ⭐	370 🍴	628 🔨	Other
BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.

Environment Management

Name	Owner	Stars	Forks	Issues	License
cli	dotnet	3495 ⭐	1074 🍴	0 🔨	undefined
The .NET Core command-line (CLI) tools, used for building .NET Core apps and libraries through your development flow (compiling, NuGet package management, running, testing, ...).

ETL

Name	Owner	Stars	Forks	Issues	License
ChoETL	Cinchoo	732 ⭐	132 🍴	67 🔨	MIT License
ETL framework for .NET (Parser / Writer for CSV, Flat, Xml, JSON, Key-Value, Parquet, Yaml, Avro formatted files)

Event aggregator and messenger

Name	Owner	Stars	Forks	Issues	License
MediatR	jbogard	10555 ⭐	1127 🍴	16 🔨	Apache License 2.0
Simple, unambitious mediator implementation in .NET
EventFlow	eventflow	2306 ⭐	440 🍴	16 🔨	Other
Async/await first CQRS+ES and DDD framework for .NET
Mediator.Net	mayuanyang	359 ⭐	50 🍴	8 🔨	Apache License 2.0
A simple mediator for .Net for sending command, publishing event and request response with pipelines supported
TinyMessenger	grumpydev	282 ⭐	71 🍴	6 🔨	Microsoft Public License
A lightweight event aggregator/messenger for loosely coupled communication.
FluentMediator	ivanpaulovich	191 ⭐	17 🍴	5 🔨	Apache License 2.0
:twisted_rightwards_arrows: FluentMediator is an unobtrusive library that allows developers to build custom pipelines for Commands, Queries and Events.
Xer.Cqrs	XerProjects	100 ⭐	8 🍴	2 🔨	MIT License
A lightweight and easy-to-use CQRS + DDD library

Exceptions

Name	Owner	Stars	Forks	Issues	License
Exceptionless.Net	exceptionless	546 ⭐	142 🍴	2 🔨	Other
Exceptionless clients for the .NET platform

Extensions

Name	Owner	Stars	Forks	Issues	License
Z.ExtensionMethods	zzzprojects	1292 ⭐	269 🍴	14 🔨	MIT License
C# Extension Methods | Over 1000 extension methods:

Functional programming

Name	Owner	Stars	Forks	Issues	License
language-ext	louthy	6125 ⭐	407 🍴	64 🔨	MIT License
C# functional language extensions - a base class library for functional programming
MoreLINQ	morelinq	3579 ⭐	406 🍴	113 🔨	Apache License 2.0
Extensions to LINQ to Objects
Optional	nlkl	877 ⭐	74 🍴	26 🔨	MIT License
A robust option type for C#
Curryfy	leandromoh	62 ⭐	3 🍴	0 🔨	Apache License 2.0
Provides strongly typed extensions methods for C# delegates to take advantages of functional programming techniques, like currying and partial application.
Optuple	atifaziz	28 ⭐	1 🍴	0 🔨	Apache License 2.0
.NET Standard Library for giving (bool, T) Option-like semantics
JFlepp.Maybe	fl3pp	4 ⭐	0 🍴	0 🔨	The Unlicense
A Maybe type for C#, aimed as an idiomatic port of the option type in F# to C#

Game

Name	Owner	Stars	Forks	Issues	License
MonoGame	MonoGame	10733 ⭐	2807 🍴	791 🔨	Other
One framework for creating powerful cross-platform games.
UnrealCLR	nxrighthere	3032 ⭐	218 🍴	7 🔨	MIT License
Unreal Engine .NET 6 integration
FNA	FNA-XNA	2502 ⭐	250 🍴	18 🔨	undefined
FNA - Accuracy-focused XNA4 reimplementation for open platforms
bepuphysics2	bepu	2137 ⭐	246 🍴	50 🔨	Apache License 2.0
Pure C# 3D real time physics simulation library, now with a higher version number.
Nez	prime31	1705 ⭐	348 🍴	42 🔨	MIT License
Nez is a free 2D focused framework that works with MonoGame and FNA
osu-framework	ppy	1555 ⭐	392 🍴	432 🔨	MIT License
A game framework written with osu! in mind.
duality	AdamsLair	1387 ⭐	288 🍴	135 🔨	MIT License
a 2D Game Development Framework
CocosSharp	mono	492 ⭐	161 🍴	81 🔨	undefined
CocosSharp is a C# implementation of the Cocos2D and Cocos3D APIs that runs on any platform where MonoGame runs.
urho	xamarin	457 ⭐	127 🍴	157 🔨	Other
Code to integrate with the Urho3D engine
DotRecast	ikpil	379 ⭐	58 🍴	9 🔨	zlib License
DotRecast - a port of Recast & Detour, Industry-standard navigation mesh toolset for .NET, C#, Unity3D, games, servers
Foster	FosterFramework	333 ⭐	25 🍴	6 🔨	MIT License
A small C# game framework
winstore-sdk	devtodev-analytics	7 ⭐	1 🍴	0 🔨	undefined
devtodev SDK for Windows and Windows Phone

GIS

Name	Owner	Stars	Forks	Issues	License
GeoJSON.Net	GeoJSON-Net	431 ⭐	167 🍴	23 🔨	MIT License
.Net library for GeoJSON types & corresponding Json.Net (de)serializers
CoordinateSharp	Tronald	347 ⭐	57 🍴	3 🔨	Other
A library designed to ease geographic coordinate format conversions, and determine sun/moon information in C#
DEM.Net	dem-net	277 ⭐	55 🍴	14 🔨	Other
Digital Elevation model library in C#. 3D terrain models, line/point Elevations, intervisibility reports
GeoJSON4EntityFramework	alatas	18 ⭐	9 🍴	4 🔨	Apache License 2.0
Create GeoJSON from Entity Framework Spatial Data or WKT

Git Tools

Name	Owner	Stars	Forks	Issues	License
gitextensions	gitextensions	7475 ⭐	2053 🍴	692 🔨	Other
Git Extensions is a standalone UI tool for managing git repositories. It also integrates with Windows Explorer and Microsoft Visual Studio (2015/2017/2019).
posh-git	dahlbyk	7366 ⭐	793 🍴	95 🔨	MIT License
A PowerShell environment for Git
libgit2sharp	libgit2	3055 ⭐	862 🍴	404 🔨	MIT License
Git + .NET = ❤
Git-Credential-Manager-for-Windows	microsoft	2844 ⭐	582 🍴	82 🔨	Other
Secure Git credential storage for Windows with support for Visual Studio Team Services, GitHub, and Bitbucket multi-factor authentication.
GitVersion	GitTools	2730 ⭐	638 🍴	40 🔨	MIT License
From git log to SemVer in no time
Bonobo-Git-Server	jakubgarfield	1786 ⭐	599 🍴	184 🔨	MIT License
Bonobo Git Server for Windows is a web application you can install on your IIS and easily manage and connect to your git repositories. Go to homepage for release and more info.
RepoZ	awaescher	968 ⭐	85 🍴	12 🔨	MIT License
👨‍💻 A zero-conf git repository hub for Windows and macOS with Windows Explorer- & CLI-enhancements
Husky.Net	alirezanet	580 ⭐	29 🍴	4 🔨	MIT License
Git hooks made easy with Husky.Net internal task runner! 🐶 It brings the dev-dependency concept to the .NET world!
GitLink	GitTools	557 ⭐	86 🍴	42 🔨	MIT License
Making .NET open source accessible!
ngit	mono	260 ⭐	154 🍴	28 🔨	undefined
Automated jgit port to c#
GitRead.Net	kingsimmy	16 ⭐	3 🍴	0 🔨	Creative Commons Zero v1.0 Universal
.Net Standard library for reading Git repository data

Graphics

Name	Owner	Stars	Forks	Issues	License
LiveCharts2	beto-rodriguez	3792 ⭐	492 🍴	127 🔨	MIT License
Simple, flexible, interactive & powerful charts, maps and gauges for .Net, LiveCharts2 can now practically run everywhere Maui, Uno Platform, Blazor-wasm, WPF, WinForms, Xamarin, Avalonia, WinUI, UWP.
Silk.NET	dotnet	3622 ⭐	348 🍴	62 🔨	MIT License
The high-speed OpenGL, OpenCL, OpenAL, OpenXR, GLFW, SDL, Vulkan, Assimp, WebGPU, and DirectX bindings library your mother warned you about.
opentk	opentk	3071 ⭐	627 🍴	50 🔨	Other
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL, OpenAL & OpenCL. It also includes windowing, mouse, keyboard and joystick input and a robust and fast math library, giving you everything you need to write your own renderer or game engine. OpenTK can be used standalone or inside a GUI on Windows, Linux, Mac.
veldrid	veldrid	2396 ⭐	265 🍴	153 🔨	MIT License
A low-level, portable graphics library for .NET.
NGraphics	praeclarum	700 ⭐	133 🍴	62 🔨	MIT License
NGraphics is a cross platform library for rendering vector graphics on .NET. It provides a unified API for both immediate and retained mode graphics using high quality native renderers.
LibTessDotNet	speps	295 ⭐	56 🍴	8 🔨	Other
C# port of the famous GLU Tessellator - prebuilt binaries now available in "releases" tab
RealTimeGraphX	royben	203 ⭐	46 🍴	6 🔨	MIT License
High performance real-time graph for WPF & UWP
VectSharp	arklumpus	128 ⭐	13 🍴	3 🔨	GNU Lesser General Public License v3.0
A light library for C# vector graphics

GraphQL

Name	Owner	Stars	Forks	Issues	License
graphql-spec	graphql	14207 ⭐	1114 🍴	218 🔨	undefined
GraphQL is a query language and execution engine tied to any backend service.
graphql-dotnet	graphql-dotnet	5731 ⭐	914 🍴	134 🔨	MIT License
GraphQL for .NET
graphql-platform	ChilliCream	4854 ⭐	703 🍴	499 🔨	MIT License
Welcome to the home of the Hot Chocolate GraphQL server for .NET, the Strawberry Shake GraphQL client for .NET and Banana Cake Pop the awesome Monaco based GraphQL IDE.
graphql-net	chkimes	889 ⭐	87 🍴	42 🔨	MIT License
Convert GraphQL to IQueryable
EntityGraphQL	EntityGraphQL	377 ⭐	51 🍴	17 🔨	MIT License
A GraphQL library for .NET
ZeroQL	byme8	239 ⭐	14 🍴	6 🔨	MIT License
C# GraphQL client with Linq-like syntax

GUI

Name	Owner	Stars	Forks	Issues	License
Avalonia	AvaloniaUI	23512 ⭐	2034 🍴	1314 🔨	MIT License
Develop Desktop, Embedded, Mobile and WebAssembly apps with C# and XAML. The most popular .NET Foundation community project.
MahApps.Metro	MahApps	9104 ⭐	2440 🍴	84 🔨	MIT License
A framework that allows developers to cobble together a better UI for their own WPF applications with minimal effort.
microsoft-ui-xaml	microsoft	5990 ⭐	650 🍴	1526 🔨	MIT License
Windows UI Library: the latest Windows 10 native controls and Fluent styles for your applications
WindowsCommunityToolkit	CommunityToolkit	5759 ⭐	1364 🍴	317 🔨	Other
The Windows Community Toolkit is a collection of helpers, extensions, and custom controls. It simplifies and demonstrates common developer tasks building .NET apps with UWP and the Windows App SDK / WinUI 3 for Windows 10 and Windows 11. The toolkit is part of the .NET Foundation.
Xamarin.Forms	xamarin	5633 ⭐	1879 🍴	2467 🔨	Other
Xamarin.Forms Official Home
HandyControl	HandyOrg	5576 ⭐	967 🍴	218 🔨	MIT License
Contains some simple and commonly used WPF controls
Eto	picoe	3464 ⭐	317 🍴	350 🔨	Other
Cross platform GUI framework for desktop and mobile applications in .NET
MaterialSkin	IgnaceMaes	2806 ⭐	818 🍴	147 🔨	MIT License
Theming .NET WinForms, C# or VB.Net, to Google's Material Design Principles.
mui	firstfloorsoftware	2588 ⭐	754 🍴	145 🔨	Microsoft Public License
Modern UI for WPF
Fluent.Ribbon	fluentribbon	2418 ⭐	504 🍴	44 🔨	MIT License
WPF Ribbon control like in Office
Dragablz	ButchersBoy	2115 ⭐	314 🍴	138 🔨	MIT License
Dragable and tearable tab control for WPF
AvalonEdit	icsharpcode	1754 ⭐	459 🍴	104 🔨	MIT License
The WPF-based text editor component used in SharpDevelop
adonis-ui	benruehl	1666 ⭐	142 🍴	43 🔨	MIT License
Lightweight UI toolkit for WPF applications offering classic but enhanced windows visuals
Ooui	praeclarum	1618 ⭐	164 🍴	110 🔨	MIT License
A small cross-platform UI library that brings the simplicity of native UI development to the web
qmlnet	qmlnet	1368 ⭐	108 🍴	51 🔨	MIT License
Qml.Net - Qt/QML integration/support for .NET
xwt	mono	1352 ⭐	238 🍴	161 🔨	MIT License
A cross-platform UI toolkit for creating desktop applications with .NET and Mono
Neutronium	NeutroniumCore	1336 ⭐	122 🍴	91 🔨	MIT License
🚀 Build .NET desktop applications using HTML, CSS and javascript.
FastColoredTextBox	PavelTorgashov	1194 ⭐	454 🍴	108 🔨	Other
Fast Colored TextBox for Syntax Highlighting. The text editor component for .NET.
ookii-dialogs-wpf	ookii-dialogs	1056 ⭐	79 🍴	37 🔨	BSD 3-Clause "New" or "Revised" License
Awesome dialogs for Windows Desktop applications built with Microsoft .NET (WPF)
ScintillaNET	jacobslusser	957 ⭐	239 🍴	101 🔨	MIT License
A Windows Forms control, wrapper, and bindings for the Scintilla text editor.
WinApi	prasannavl	810 ⭐	100 🍴	29 🔨	Apache License 2.0
A simple, direct, ultra-thin CLR library for high-performance Win32 Native Interop
RibbonWinForms	RibbonWinForms	727 ⭐	196 🍴	37 🔨	Microsoft Public License
An Office Ribbon Control for .NET WinForms
QtSharp	ddobrev	568 ⭐	53 🍴	29 🔨	Other
Mono/.NET bindings for Qt
ookii-dialogs-winforms	ookii-dialogs	555 ⭐	49 🍴	17 🔨	BSD 3-Clause "New" or "Revised" License
Awesome dialogs for Windows Desktop applications built with Microsoft .NET (WinForms)
gtk-sharp	mono	418 ⭐	142 🍴	50 🔨	Other
Gtk# is a Mono/.NET binding to the cross platform Gtk+ GUI toolkit and the foundation of most GUI apps built with Mono
callisto	timheuer	340 ⭐	112 🍴	57 🔨	Other
A control toolkit for Windows 8 XAML applications. Contains some UI controls to make it easier to create Windows UI style apps for the Windows Store in accordance with Windows UI guidelines.
lara	integrativesoft	146 ⭐	8 🍴	3 🔨	Apache License 2.0
Lara Web Engine is a lightweight C# framework for web user interface development.
SciterSharp	ramon-mendes	104 ⭐	21 🍴	4 🔨	GNU General Public License v3.0
C# bindings for Sciter - create HTML/CSS/TIScript based native apps

HTML and CSS

Name	Owner	Stars	Forks	Issues	License
AngleSharp	AngleSharp	4967 ⭐	549 🍴	8 🔨	MIT License
:angel: The ultimate angle brackets parser library parsing HTML5, MathML, SVG and CSS to construct a DOM based on the official W3C specifications.
dotless	dotless	694 ⭐	201 🍴	82 🔨	Apache License 2.0
.NET Port of the ruby Less CSS lib
ExCSS	TylerBrinks	314 ⭐	123 🍴	12 🔨	MIT License
A CSS Parser for .NET. It's BADA55!
LtGt	Tyrrrz	119 ⭐	8 🍴	0 🔨	MIT License
Lightweight HTML processor
LibSassHost	Taritsyn	82 ⭐	11 🍴	1 🔨	Apache License 2.0
.NET wrapper around the LibSass library with the ability to support a virtual file system.

HTTP

Name	Owner	Stars	Forks	Issues	License
RestSharp	restsharp	9419 ⭐	2312 🍴	48 🔨	Apache License 2.0
Simple REST and HTTP API Client for .NET
refit	reactiveui	8025 ⭐	719 🍴	190 🔨	MIT License
The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.
WebApiClient	dotnetcore	2003 ⭐	439 🍴	8 🔨	MIT License
An open source project based on the HttpClient. You only need to define the c# interface and modify the related features to invoke the client library of the remote http interface asynchronously.
RestEase	canton7	1037 ⭐	105 🍴	12 🔨	MIT License
Easy-to-use typesafe REST API client library for .NET Standard 1.1 and .NET Framework 4.5 and higher, which is simple and customisable. Inspired by Refit
EasyHttp	EasyHttp	968 ⭐	271 🍴	19 🔨	Other
Http Library for C#
Http.fs	haf	317 ⭐	43 🍴	18 🔨	undefined
A simple, functional HTTP client library for F#
Tiny.RestClient	jgiacomini	206 ⭐	30 🍴	19 🔨	MIT License
Simpliest Fluent REST client for .NET
Apizr	Respawnsive	123 ⭐	10 🍴	0 🔨	Apache License 2.0
Refit based web api client management, but resilient (retry, connectivity, cache, auth, log, priority, etc...)
RestLess	letsar	109 ⭐	12 🍴	8 🔨	MIT License
The automatic type-safe-reflectionless REST API client library for .Net Standard
fluxzy.core	haga-rak	71 ⭐	3 🍴	2 🔨	Other
Fast and fully streamed Man-On-The-Middle engine and a CLI app to intercept, record and alter HTTP/1.1, H2, websocket traffic over plain or secure channels.
httpclientgoodies.net	jeffijoe	65 ⭐	7 🍴	1 🔨	MIT License
Useful utilities for the .NET HttpClient.

IDE

Name	Owner	Stars	Forks	Issues	License
monodevelop	mono	2799 ⭐	1005 🍴	655 🔨	undefined
MonoDevelop is a cross platform .NET IDE
roslynpad	roslynpad	2204 ⭐	329 🍴	46 🔨	MIT License
A cross-platform C# editor based on Roslyn and AvalonEdit
SharpDevelop	icsharpcode	2031 ⭐	760 🍴	317 🔨	undefined
#develop (short for SharpDevelop) is a free IDE for .NET programming languages.
AvalonStudio	VitalElement	1570 ⭐	225 🍴	92 🔨	GNU Lesser General Public License v3.0
Cross platform IDE and Shell
mongo-csharp-analyzer	mongodb	21 ⭐	10 🍴	5 🔨	Apache License 2.0
The MongoDB Analyzer is a free tool that helps you understand how your code translates into the MongoDB Query API.

Image Processing

Name	Owner	Stars	Forks	Issues	License
ImageSharp	SixLabors	7055 ⭐	838 🍴	45 🔨	Other
:camera: A modern, cross-platform, 2D Graphics library for .NET
Magick.NET	dlemstra	3208 ⭐	405 🍴	67 🔨	Apache License 2.0
The .NET library for ImageMagick
ImageProcessor	JimBobSquarePants	2498 ⭐	498 🍴	3 🔨	Apache License 2.0
:camera: A fluent wrapper around System.Drawing for the processing of image files.
metadata-extractor-dotnet	drewnoakes	885 ⭐	153 🍴	62 🔨	Other
Extracts Exif, IPTC, XMP, ICC and other metadata from image, video and audio files
PhotoSauce	saucecontrol	540 ⭐	48 🍴	12 🔨	MIT License
MagicScaler high-performance, high-quality image processing pipeline for .NET
dot-imaging	dajuric	314 ⭐	36 🍴	14 🔨	undefined
Minimalistic .NET imaging portable platform
Colourful	tompazourek	267 ⭐	35 🍴	35 🔨	MIT License
🎨 Open source .NET library for working with color spaces.
PixelViewer	carina-studio	187 ⭐	31 🍴	4 🔨	MIT License
A cross-platform image viewer which supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it.
ImageWizard	usercode	62 ⭐	10 🍴	0 🔨	MIT License
Image processing webservice based on ASP.NET Core and ImageSharp / SkiaSharp / SvgNet / DocNET
ColorHelper	iamartyom	60 ⭐	9 🍴	3 🔨	MIT License

Install tools

Name	Owner	Stars	Forks	Issues	License
choco	chocolatey	9819 ⭐	872 🍴	785 🔨	Other
Chocolatey - the package manager for Windows
Squirrel.Windows	Squirrel	7135 ⭐	1020 🍴	406 🔨	MIT License
An installation and update framework for Windows desktop apps
Onova	Tyrrrz	478 ⭐	37 🍴	0 🔨	MIT License
Unintrusive auto-update framework

Interactive programming

Name	Owner	Stars	Forks	Issues	License
interactive	dotnet	2719 ⭐	364 🍴	503 🔨	MIT License
.NET Interactive combines the power of .NET with many other languages to create notebooks, REPLs, and embedded coding experiences. Share code, explore data, write, and learn across your apps in ways you couldn't before.

Internationalization

Name	Owner	Stars	Forks	Issues	License
ResXResourceManager	dotnet	1240 ⭐	203 🍴	64 🔨	MIT License
Manage localization of all ResX-Based resources in one central place.
i18n	turquoiseowl	555 ⭐	156 🍴	65 🔨	Other
Smart internationalization for ASP.NET
messageformat.net	jeffijoe	154 ⭐	23 🍴	5 🔨	MIT License
ICU MessageFormat implementation for .NET.

Interoperability

Name	Owner	Stars	Forks	Issues	License
pythonnet	pythonnet	4321 ⭐	678 🍴	136 🔨	MIT License
Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers.
CppSharp	mono	2967 ⭐	473 🍴	308 🔨	MIT License
Tools and libraries to glue C/C++ APIs to high-level languages
pinvoke	dotnet	2087 ⭐	217 🍴	1 🔨	MIT License
A library containing all P/Invoke code so you don't have to import it every time. Maintained and updated to support the latest Windows OS.
pinvoke-interop-assistant	jaredpar	411 ⭐	87 🍴	13 🔨	undefined
PInvoke Interop Assistant
sharpen	mono	376 ⭐	144 🍴	34 🔨	GNU General Public License v2.0
Sharpen is an Eclipse plugin created by db4o that allows you to convert your Java project into c#
cxxi	mono	199 ⭐	45 🍴	7 🔨	Other
C++ interop framework
Pyrolite	irmen	176 ⭐	48 🍴	1 🔨	MIT License
Java and .NET client interface for Pyro5 protocol
LegacyWrapper	CodefoundryDE	78 ⭐	20 🍴	19 🔨	MIT License
LegacyWrapper uses a x86 wrapper to call legacy dlls from a 64 bit process (or vice versa).

IoC

Name	Owner	Stars	Forks	Issues	License
Autofac	autofac	4367 ⭐	831 🍴	11 🔨	MIT License
An addictive .NET IoC container
Scrutor	khellang	3400 ⭐	229 🍴	52 🔨	MIT License
Assembly scanning and decoration extensions for Microsoft.Extensions.DependencyInjection
Ninject	ninject	2655 ⭐	529 🍴	89 🔨	Other
the ninja of .net dependency injectors
unity	unitycontainer	1641 ⭐	359 🍴	1 🔨	Apache License 2.0
This repository contains all relevant information about Unity Container suit
Windsor	castleproject	1503 ⭐	456 🍴	90 🔨	Apache License 2.0
Castle Windsor is a best of breed, mature Inversion of Control container available for .NET
SimpleInjector	simpleinjector	1179 ⭐	149 🍴	32 🔨	MIT License
An easy, flexible, and fast Dependency Injection library that promotes best practice to steer developers towards the pit of success.
DryIoc	dadhi	962 ⭐	120 🍴	41 🔨	MIT License
DryIoc is fast, small, full-featured IoC Container for .NET
spring-net	spring-projects	829 ⭐	370 🍴	8 🔨	Apache License 2.0
Spring Framework for .NET
TinyIoC	grumpydev	827 ⭐	238 🍴	55 🔨	MIT License
An easy to use, hassle free, Inversion of Control Container for small projects, libraries and beginners alike.
LightInject	seesharper	613 ⭐	122 🍴	96 🔨	MIT License
An ultra lightweight IoC container
vs-mef	microsoft	400 ⭐	86 🍴	27 🔨	MIT License
Managed Extensibility Framework (MEF) implementation used by Visual Studio
stashbox	z4kn4fein	133 ⭐	10 🍴	0 🔨	MIT License
A lightweight, fast, and portable dependency injection framework for .NET-based solutions.

JavaScript Engines

Name	Owner	Stars	Forks	Issues	License
edge	tjanczuk	5399 ⭐	643 🍴	373 🔨	Other
Run .NET and Node.js code in-process on Windows, MacOS, and Linux
jint	sebastienros	3887 ⭐	539 🍴	27 🔨	BSD 2-Clause "Simplified" License
Javascript Interpreter for .NET
ClearScript	microsoft	1645 ⭐	146 🍴	15 🔨	MIT License
A library for adding scripting to .NET applications. Supports V8 (Windows, Linux, macOS) and JScript/VBScript (Windows).
jurassic	paulbartrum	846 ⭐	120 🍴	64 🔨	MIT License
A .NET library to parse and execute JavaScript code.
yantra	yantrajs	171 ⭐	7 🍴	15 🔨	Apache License 2.0
JavaScript Engine for .NET Standard

Logging

Name	Owner	Stars	Forks	Issues	License
serilog	serilog	6912 ⭐	790 🍴	41 🔨	Apache License 2.0
Simple .NET logging with fully-structured events
Foundatio	FoundatioFx	1905 ⭐	239 🍴	28 🔨	Apache License 2.0
Pluggable foundation blocks for building distributed apps.
StackExchange.Exceptional	NickCraver	857 ⭐	166 🍴	20 🔨	Apache License 2.0
Error handler used for the Stack Exchange network
sentry-dotnet	getsentry	557 ⭐	201 🍴	224 🔨	MIT License
Sentry SDK for .NET
Exceptionless.Net	exceptionless	546 ⭐	142 🍴	2 🔨	Other
Exceptionless clients for the .NET platform
logary	causiq	525 ⭐	71 🍴	71 🔨	Other
Logs and metrics are one! Professional logging, metrics and analytics for your apps.
ZeroLog	Abc-Arbitrage	378 ⭐	28 🍴	1 🔨	MIT License
A high-performance, zero-allocation .NET logging library.
ULogViewer	carina-studio	289 ⭐	26 🍴	6 🔨	MIT License
Cross-Platform Universal Log Viewer.
elmah-mvc	alexbeletsky	266 ⭐	61 🍴	36 🔨	Apache License 2.0
Painless integration of ELMAH into ASP.NET MVC application
semantic-logging	microsoftarchive	215 ⭐	80 🍴	6 🔨	Other
Supporting semantic/structured logging for .NET
Sejil	alaatm	170 ⭐	36 🍴	7 🔨	Apache License 2.0
Capture, view and filter your ASP.net core log events right from your app
essential-diagnostics	sgryphon	65 ⭐	25 🍴	34 🔨	Microsoft Reciprocal License
Essential.Diagnostics contains additional trace listeners, filters and utility classes for the .NET Framework System.Diagnostics trace logging. Included are colored console, SQL database, rolling file, Seq logging server, and in-memory trace listeners, expression filters, activity and logical operation scopes, and configuration file monitoring.
Rollbar.NET	rollbar	64 ⭐	46 🍴	12 🔨	MIT License
Rollbar for .NET
Logazmic	ihtfw	57 ⭐	15 🍴	2 🔨	MIT License
Windows log viewer for log4j

Machine Learning and Data Science

Name	Owner	Stars	Forks	Issues	License
machinelearning	dotnet	8806 ⭐	1835 🍴	905 🔨	MIT License
ML.NET is an open source and cross-platform machine learning framework for .NET.
m2cgen	BayesWitnesses	2701 ⭐	230 🍴	52 🔨	MIT License
Transform ML models into a native code (Java, C, Python, Go, JavaScript, Visual Basic, C#, R, PowerShell, PHP, Dart, Haskell, Ruby, F#, Rust) with zero dependencies
GeneticSharp	giacomelli	1212 ⭐	319 🍴	10 🔨	MIT License
GeneticSharp is a fast, extensible, multi-platform and multithreading C# Genetic Algorithm library that simplifies the development of applications using Genetic Algorithms (GAs).
FSharp.Data	fsprojects	801 ⭐	289 🍴	155 🔨	Other
F# Data: Library for Data Access
catalyst	curiosity-ai	669 ⭐	67 🍴	30 🔨	MIT License
🚀 Catalyst is a C# Natural Language Processing library built for speed. Inspired by spaCy's design, it brings pre-trained models, out-of-the box support for training word and document embeddings, and flexible entity recognition models.
numl	sethjuarez	429 ⭐	105 🍴	14 🔨	MIT License
Machine Learning for .NET
accord-net-extensions	dajuric	340 ⭐	285 🍴	8 🔨	undefined
Advanced image processing and computer vision algorithms made as fluent extensions and built for portability
Synapses	mrdimosthenis	68 ⭐	6 🍴	0 🔨	undefined
A group of neural-network libraries for functional and mainstream languages

Mail

Name	Owner	Stars	Forks	Issues	License
MailKit	jstedfast	5902 ⭐	794 🍴	6 🔨	MIT License
A cross-platform .NET library for IMAP, POP3, and SMTP.
FluentEmail	lukencode	2889 ⭐	424 🍴	129 🔨	MIT License
All in one email sender for .NET. Supports popular senders (SendGrid, MailGun, etc) and Razor templates.
MimeKit	jstedfast	1743 ⭐	352 🍴	8 🔨	MIT License
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
PreMailer.Net	milkshakesoftware	639 ⭐	117 🍴	29 🔨	MIT License
C# library that moves your stylesheets to inline style attributes, for maximum compatibility with E-mail clients.
StrongGrid	Jericho	172 ⭐	35 🍴	15 🔨	undefined
Strongly typed library for the entire SendGrid v3 API, including webhooks
MailKitSimplified	danzuep	50 ⭐	7 🍴	3 🔨	MIT License
Send and receive emails easily, fluently, with one line of code for each operation.

Markdown Processors

Name	Owner	Stars	Forks	Issues	License
markdig	xoofx	4061 ⭐	427 🍴	100 🔨	BSD 2-Clause "Simplified" License
A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET

Mathematics

Name	Owner	Stars	Forks	Issues	License
automatic-graph-layout	microsoft	1318 ⭐	307 🍴	127 🔨	Other
A set of tools for graph layout and viewing
AngouriMath	asc-community	749 ⭐	69 🍴	129 🔨	MIT License
New open-source cross-platform symbolic algebra library for C# and F#. Can be used for both production and research purposes.
xaml-math	ForNeVeR	603 ⭐	96 🍴	84 🔨	MIT License
A collection of .NET libraries for rendering mathematical formulae using the LaTeX typesetting style, for the WPF and Avalonia XAML-based frameworks
UnitConversion	atulmish	177 ⭐	27 🍴	6 🔨	MIT License
Expansible Unit Conversion Library for .Net Core and .Net Framework
GeometRi.CSharp	RiSearcher	163 ⭐	33 🍴	0 🔨	MIT License
Simple and lightweight computational geometry library for .Net
MKL.NET	MKL-NET	146 ⭐	18 🍴	0 🔨	Apache License 2.0
A simple cross platform .NET API for Intel MKL
Math3D	vimaec	95 ⭐	10 🍴	4 🔨	MIT License
A .NET Standard 2.0 library for simple and efficient 3D math that is a feature-rich replacement for System.Numerics https://vimaec.github.io/Math3D
autodiff	alexshtf	85 ⭐	12 🍴	3 🔨	MIT License
A .NET library that provides fast, accurate and automatic differentiation (computes derivative / gradient) of mathematical functions.
Rationals	tompazourek	75 ⭐	12 🍴	6 🔨	MIT License
🔟 Implementation of rational number arithmetic for .NET with arbitrary precision.

Media

Name	Owner	Stars	Forks	Issues	License
NAudio	naudio	5205 ⭐	1081 🍴	471 🔨	MIT License
Audio and MIDI library for .NET
cscore	filoe	2095 ⭐	452 🍴	89 🔨	Other
An advanced audio library, written in C#. Provides tons of features. From playing/recording audio to decoding/encoding audio streams/files to processing audio data in realtime (e.g. applying custom effects during playback, create visualizations,...). The possibilities are nearly unlimited.
libvlcsharp	videolan	1363 ⭐	248 🍴	7 🔨	GNU Lesser General Public License v2.1
Cross-platform .NET/Mono bindings for LibVLC
taglib-sharp	mono	1220 ⭐	307 🍴	147 🔨	GNU Lesser General Public License v2.1
Library for reading and writing metadata in media files
Xabe.FFmpeg	tomaszzmuda	695 ⭐	123 🍴	49 🔨	Other
.NET Standard wrapper for FFmpeg. It allows to process media without know how FFmpeg works, and can be used to pass customized arguments to FFmpeg from dotnet core application.
SeeShark	Speykious	135 ⭐	10 🍴	10 🔨	BSD 3-Clause "New" or "Revised" License
Simple C# camera library.

Metrics

Name	Owner	Stars	Forks	Issues	License
Foundatio	FoundatioFx	1905 ⭐	239 🍴	28 🔨	Apache License 2.0
Pluggable foundation blocks for building distributed apps.
statsd-csharp-client	Pereingo	111 ⭐	67 🍴	0 🔨	MIT License
Statsd C# Client

Micro Framework

Name	Owner	Stars	Forks	Issues	License
netmf-interpreter	NETMF	483 ⭐	223 🍴	175 🔨	Other
.NET Micro Framework Interpreter

Minification

Name	Owner	Stars	Forks	Issues	License
WebMarkupMin	Taritsyn	431 ⭐	47 🍴	2 🔨	Apache License 2.0
The Web Markup Minifier (abbreviated WebMarkupMin) - a .NET library that contains a set of markup minifiers. The objective of this project is to improve the performance of web applications by reducing the size of HTML, XHTML and XML code.
CompressedStaticFiles	AnderssonPeter	83 ⭐	17 🍴	4 🔨	Apache License 2.0
asp.net core middleware to send compressed static files to the browser without having to compress on demand, also has support for sending more advanced image formats when the browser indicates that i has support for it.

Misc

Name	Owner	Stars	Forks	Issues	License
Polly	App-vNext	12915 ⭐	1126 🍴	12 🔨	BSD 3-Clause "New" or "Revised" License
Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner. From version 6.0.1, Polly targets .NET Standard 1.1 and 2.0+.
FluentValidation	FluentValidation	8734 ⭐	1169 🍴	6 🔨	Apache License 2.0
A popular .NET validation library for building strongly-typed validation rules.
Humanizer	Humanizr	8320 ⭐	931 🍴	155 🔨	Other
Humanizer meets all your .NET needs for manipulating and displaying strings, enums, dates, times, timespans, numbers and quantities
CsvHelper	JoshClose	4515 ⭐	1036 🍴	288 🔨	Other
Library to help reading and writing CSV files
coravel	jamesmh	3544 ⭐	235 🍴	65 🔨	MIT License
Near-zero config .NET library that makes advanced application features like Task Scheduling, Caching, Queuing, Event Broadcasting, and more a breeze!
hashids.net	ullmark	3244 ⭐	166 🍴	2 🔨	MIT License
A small .NET package to generate YouTube-like hashes from one or many numbers. Use hashids when you do not want to expose your database ids to the user.
rant3	TheBerkin	2969 ⭐	108 🍴	9 🔨	MIT License
(Obsolete) Archive of Rant 3.x.
YoutubeExplode	Tyrrrz	2671 ⭐	460 🍴	6 🔨	MIT License
Abstraction layer over YouTube's internal API
scriptcs	scriptcs	2451 ⭐	369 🍴	169 🔨	Other
Write C# apps with a text editor, nuget and the power of Roslyn!
React.NET	reactjs	2271 ⭐	947 🍴	104 🔨	MIT License
.NET library for JSX compilation and server-side rendering of React components
Enums.NET	TylerBrinkley	1644 ⭐	101 🍴	5 🔨	MIT License
Enums.NET is a high-performance type-safe .NET enum utility library
guard	safakgur	715 ⭐	51 🍴	0 🔨	MIT License
A high-performance, extensible argument validation library.
DeviceId	MatthewKing	678 ⭐	111 🍴	16 🔨	MIT License
A simple library providing functionality to generate a 'device ID' that can be used to uniquely identify a computer.
Warden	warden-stack	613 ⭐	69 🍴	14 🔨	MIT License
Define "health checks" for your applications, resources and infrastructure. Keep your Warden on the watch.
Jot	anakic	597 ⭐	51 🍴	5 🔨	MIT License
Jot is a library for persisting and applying .NET application state.
HidLibrary	mikeobrien	556 ⭐	222 🍴	71 🔨	MIT License
This library enables you to enumerate and communicate with Hid compatible USB devices in .NET.
ByteSize	omar	531 ⭐	52 🍴	17 🔨	MIT License
ByteSize is a utility class that makes byte size representation in code easier by removing ambiguity of the value being represented. ByteSize is to bytes what System.TimeSpan is to time.
Aeron.NET	AdaptiveConsulting	470 ⭐	95 🍴	3 🔨	Apache License 2.0
Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron
Streams	nessos	381 ⭐	46 🍴	12 🔨	Other
A lightweight F#/C# library for efficient functional-style pipelines on streams of data.
Valit	valit-stack	321 ⭐	26 🍴	11 🔨	MIT License
Valit is dead simple validation for .NET Core. No more if-statements all around your code. Write nice and clean fluent validators instead!
ConsoleTableExt	minhhungit	318 ⭐	36 🍴	5 🔨	MIT License
A fluent library to print out a nicely formatted table in a console application C#
DeviceDetector.NET	totpero	312 ⭐	69 🍴	8 🔨	Apache License 2.0
The Universal Device Detection library will parse any User Agent and detect the browser, operating system, device used (desktop, tablet, mobile, tv, cars, console, etc.), brand and model.
Validot	bartoszlenar	284 ⭐	18 🍴	10 🔨	MIT License
Validot is a performance-first, compact library for advanced model validation. Using a simple declarative fluent interface, it efficiently handles classes, structs, nested members, collections, nullables, plus any relation or combination of them. It also supports translations, custom logic extensions with tests, and DI containers.
TypeShape	eiriktsarpalis	280 ⭐	38 🍴	1 🔨	MIT License
Practical generic programming for F#
Quickenshtein	Turnerj	272 ⭐	14 🍴	11 🔨	MIT License
Making the quickest and most memory efficient implementation of Levenshtein Distance with SIMD and Threading support
RecordParser	leandromoh	268 ⭐	11 🍴	6 🔨	MIT License
Zero Allocation Writer/Reader Parser for .NET Core
FormHelper	sinanbozkus	263 ⭐	36 🍴	7 🔨	MIT License
ASP.NET Core - Transform server-side validations to client-side without writing any javascript code. (Compatible with Fluent Validation)
InfinityCrawler	TurnerSoftware	236 ⭐	35 🍴	13 🔨	MIT License
A simple but powerful web crawler library for .NET
Shielded	jbakic	235 ⭐	20 🍴	3 🔨	MIT License
A strict and mostly lock-free Software Transactional Memory (STM) for .NET
SystemWrapper	jozefizso	172 ⭐	63 🍴	10 🔨	Microsoft Public License
.NET library for easier testing of system APIs.
NaturalSort.Extension	tompazourek	150 ⭐	11 🍴	0 🔨	MIT License
🔀 Extension method for StringComparison that adds support for natural sorting (e.g. "abc1", "abc2", "abc10" instead of "abc1", "abc10", "abc2").
FlatMapper	joaomatossilva	90 ⭐	15 🍴	2 🔨	Apache License 2.0
FlatMapper is a library to import and export data from and to plain text files.
system-text-json-jsondiffpatch	weichch	90 ⭐	11 🍴	15 🔨	MIT License
High-performance, low-allocating JSON object diff and patch extension for System.Text.Json. Support generating patch document in RFC 6902 JSON Patch format.
BuildVersioning	TurnerSoftware	55 ⭐	4 🍴	4 🔨	MIT License
Simple build versioning for .NET, powered by Git tags
AzureCrawler	yagopv	42 ⭐	7 🍴	0 🔨	MIT License
Take HTML Snapshots for your Angular, Ember, Durandal or any JavaScript applications
dotnet-exec	WeihanLi	41 ⭐	4 🍴	6 🔨	Apache License 2.0
dotnet execute with custom entry point, another dotnet run without project file

MVVM

Name	Owner	Stars	Forks	Issues	License
Prism	PrismLibrary	6093 ⭐	1619 🍴	22 🔨	Other
Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Xamarin Forms, and Uno / Win UI Applications..
WindowsCommunityToolkit	CommunityToolkit	5759 ⭐	1364 🍴	317 🔨	Other
The Windows Community Toolkit is a collection of helpers, extensions, and custom controls. It simplifies and demonstrates common developer tasks building .NET apps with UWP and the Windows App SDK / WinUI 3 for Windows 10 and Windows 11. The toolkit is part of the .NET Foundation.
MvvmCross	MvvmCross	3814 ⭐	1303 🍴	204 🔨	Microsoft Public License
The .NET MVVM framework for cross-platform solutions, including Android, iOS, MacCatalyst, macOS, tvOS, WPF, WinUI
Caliburn.Micro	Caliburn-Micro	2762 ⭐	772 🍴	93 🔨	MIT License
A small, yet powerful framework, designed for building applications across all XAML platforms. Its strong support for MV* patterns will enable you to build your solution quickly, without the need to sacrifice code quality or testability.
dotnet	CommunityToolkit	2696 ⭐	245 🍴	130 🔨	Other
.NET Community Toolkit is a collection of helpers and APIs that work for all .NET developers and are agnostic of any specific UI platform. The toolkit is maintained and published by Microsoft, and part of the .NET Foundation.
Maui	CommunityToolkit	2009 ⭐	316 🍴	128 🔨	MIT License
The .NET MAUI Community Toolkit is a community-created library that contains .NET MAUI Extensions, Advanced UI/UX Controls, and Behaviors to help make your life as a .NET MAUI developer easier
mvvmlight	lbugnion	1154 ⭐	312 🍴	74 🔨	MIT License
The main purpose of the toolkit is to accelerate the creation and development of MVVM applications in Xamarin.Android, Xamarin.iOS, Xamarin.Forms, Windows 10 UWP, Windows Presentation Foundation (WPF), Silverlight, Windows Phone.
gemini	tgjones	1076 ⭐	292 🍴	64 🔨	Other
Gemini is an IDE framework similar in concept to the Visual Studio Shell. It uses AvalonDock and has an MVVM architecture based on Caliburn Micro.
waf	jbe2277	693 ⭐	128 🍴	5 🔨	MIT License
Win Application Framework (WAF) is a lightweight Framework that helps you to create well structured XAML Applications.
mvvm-dialogs	FantasticFiasco	615 ⭐	75 🍴	7 🔨	Apache License 2.0
Library simplifying the concept of opening dialogs from a view model when using MVVM in WPF
EBind	SIDOVSKY	159 ⭐	7 🍴	3 🔨	Apache License 2.0
🔵 .NET Data Binding we deserve: concise, fast, feature-rich
TomsToolbox	tom-englert	96 ⭐	19 🍴	0 🔨	MIT License
A set of core functions and classes to ease every days .Net development tasks.
Smaragd	nkristek	34 ⭐	6 🍴	0 🔨	MIT License
A platform-independent, lightweight library for developing .NET applications using the MVVM architecture

Networking

Name	Owner	Stars	Forks	Issues	License
NetCoreServer	chronoxor	2432 ⭐	528 🍴	152 🔨	MIT License
Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution
sharppcap	dotpcap	1223 ⭐	264 🍴	32 🔨	undefined
Official repository - Fully managed, cross platform (Windows, Mac, Linux) .NET library for capturing packets

Object to object mapping

Name	Owner	Stars	Forks	Issues	License
AutoMapper	AutoMapper	9730 ⭐	1728 🍴	1 🔨	MIT License
A convention-based object-object mapper in .NET.
Mapster	MapsterMapper	4120 ⭐	313 🍴	175 🔨	MIT License
A fast, fun and stimulating object to object Mapper
mapperly	riok	2284 ⭐	120 🍴	54 🔨	Apache License 2.0
A .NET source generator for generating object mappings. No runtime reflection.
TinyMapper	TinyMapper	686 ⭐	113 🍴	37 🔨	MIT License
A quick object-object mapper for .NET
AgileMapper	agileobjects	453 ⭐	25 🍴	12 🔨	MIT License
A zero-configuration, highly-configurable, unopinionated object mapper with viewable execution plans. Flattens, unflattens, deep clones, merges, updates and projects queries. .NET 3.5+ and .NET Standard 1.0+.
ExpressMapper	fluentsprings	306 ⭐	65 🍴	61 🔨	Other
Mapping .Net types

Office

Name	Owner	Stars	Forks	Issues	License
ClosedXML	ClosedXML	4359 ⭐	795 🍴	426 🔨	MIT License
ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.
Open-XML-SDK	dotnet	3850 ⭐	535 🍴	128 🔨	MIT License
Open XML SDK by Microsoft
ExcelDataReader	ExcelDataReader	3774 ⭐	944 🍴	74 🔨	MIT License
Lightweight and fast library written in C# for reading Microsoft Excel files
EPPlus	JanKallman	3735 ⭐	1153 🍴	453 🔨	undefined
Create advanced Excel spreadsheets using .NET
MiniExcel	mini-software	2363 ⭐	293 🍴	208 🔨	Apache License 2.0
Fast, Low-Memory, Easy Excel .NET helper to import/export/template spreadsheet (support Linux, Mac)
DocX	xceedsoftware	1681 ⭐	464 🍴	313 🔨	Other
Fast and easy to use .NET library that creates or modifies Microsoft Word files without installing Word.
ExcelDna	Excel-DNA	1226 ⭐	265 🍴	144 🔨	zlib License
Excel-DNA - Free and easy .NET for Excel. This repository contains the core Excel-DNA library.
NetOffice	NetOfficeFw	664 ⭐	142 🍴	45 🔨	MIT License
🌌 Create add-ins and automation code for Microsoft Office applications.
toxy	nissl-lab	347 ⭐	105 🍴	2 🔨	Apache License 2.0
.net text extraction framework
ShapeCrawler	ShapeCrawler	242 ⭐	50 🍴	59 🔨	MIT License
🍂 A .NET library for manipulating PowerPoint presentations
OfficeIMO	EvotecIT	238 ⭐	43 🍴	45 🔨	MIT License
Fast and easy to use cross-platform .NET library that creates or modifies Microsoft Word (DocX) and later also Excel (XLSX) files without installing any software. Library is based on Open XML SDK
npoi	tonyqus	48 ⭐	7 🍴	1 🔨	Apache License 2.0
a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.

OpenAI

Name	Owner	Stars	Forks	Issues	License
Cledev.OpenAI	Cledev-Limited	100 ⭐	16 🍴	1 🔨	MIT License
.NET 7 SDK for OpenAI with a Blazor Server playground

ORM

Name	Owner	Stars	Forks	Issues	License
Dapper	DapperLib	17087 ⭐	3642 🍴	473 🔨	Other
Dapper - a simple object mapper for .Net
efcore	dotnet	13271 ⭐	3073 🍴	2045 🔨	MIT License
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations.
SqlSugar	DotNetNext	4937 ⭐	1294 🍴	2 🔨	MIT License
.Net aot ORM Fastest ORM Simple Easy Sqlite orm Oracle ORM Mysql Orm postgresql ORm SqlServer oRm 达梦 ORM 人大金仓 ORM 神通ORM C# ORM , C# ORM .NET ORM NET5 ORM .NET6 ORM ClickHouse orm QuestDb ,TDengine ORM,OceanBase orm,GaussDB orm ,Tidb orm Object/Relational Mapping
EFCore.BulkExtensions	borisdj	3446 ⭐	567 🍴	59 🔨	Other
Entity Framework EF Core efcore Bulk Batch Extensions with BulkCopy in .Net for Insert Update Delete Read (CRUD), Truncate and SaveChanges operations on SQL Server, PostgreSQL, MySQL, SQLite
fluentmigrator	fluentmigrator	3117 ⭐	644 🍴	174 🔨	Apache License 2.0
Fluent migrations framework for .NET
linq2db	linq2db	2847 ⭐	450 🍴	490 🔨	MIT License
Linq to database provider.
PetaPoco	CollaboratingPlatypus	2050 ⭐	595 🍴	103 🔨	Other
Official PetaPoco, A tiny ORM-ish thing for your POCO's
Massive	FransBouma	1801 ⭐	322 🍴	15 🔨	Other
A small, happy, dynamic MicroORM for .NET that will love you forever.
Dapper-Extensions	tmsmith	1772 ⭐	585 🍴	79 🔨	undefined
Dapper Extensions is a small library that complements Dapper by adding basic CRUD operations (Get, Insert, Update, Delete) for your POCOs. For more advanced querying scenarios, Dapper Extensions provides a predicate system. The goal of this library is to keep your POCOs pure by not requiring any attributes or base class inheritance.
fluent-nhibernate	nhibernate	1652 ⭐	688 🍴	127 🔨	BSD 3-Clause "New" or "Revised" License
Fluent NHibernate!
RepoDB	mikependon	1646 ⭐	123 🍴	133 🔨	Apache License 2.0
A hybrid ORM library for .NET.
ServiceStack.OrmLite	ServiceStack	1529 ⭐	643 🍴	46 🔨	Other
Fast, Simple, Typed ORM for .NET
ef6	dotnet	1404 ⭐	533 🍴	2 🔨	MIT License
This is the codebase for Entity Framework 6 (previously maintained at https://entityframework.codeplex.com). Entity Framework Core is maintained at https://github.com/dotnet/efcore.
EntityFramework.Exceptions	Giorgi	1112 ⭐	63 🍴	0 🔨	Other
Handle database errors easily when working with Entity Framework Core. Supports SQLServer, PostgreSQL, SQLite, Oracle and MySql.
SmartSql	dotnetcore	1041 ⭐	223 🍴	38 🔨	Apache License 2.0
SmartSql = MyBatis in C# + .NET Core+ Cache(Memory | Redis) + R/W Splitting + PropertyChangedTrack +Dynamic Repository + InvokeSync + Diagnostics
Insight.Database	jonwagner	837 ⭐	144 🍴	13 🔨	Other
Fast, lightweight .NET micro-ORM
NPoco	schotime	835 ⭐	303 🍴	55 🔨	Apache License 2.0
Simple microORM that maps the results of a query onto a POCO object. Project based on Schotime's branch of PetaPoco
FastCrud	MoonStorm	484 ⭐	124 🍴	18 🔨	MIT License
fast & light .NET ORM for strongly typed people
MongoFramework	TurnerSoftware	383 ⭐	34 🍴	45 🔨	MIT License
An "Entity Framework"-like interface for MongoDB
Venflow	TwentyFourMinutes	168 ⭐	5 🍴	16 🔨	Apache License 2.0
A brand new, fast and lightweight ORM, build for PostgreSQL.
EntityFrameworkCore.SqlServer.SimpleBulks	phongnguyend	143 ⭐	22 🍴	2 🔨	MIT License
Very simple .net library that supports bulk insert (retain client populated Ids or return db generated Ids), bulk update, bulk delete and bulk merge operations. Lambda Expression is supported.
AsyncPoco	tmenier	128 ⭐	33 🍴	10 🔨	Other
A long-"awaited" fully asynchronous PetaPoco fork
MicroLite	MicroLite-ORM	85 ⭐	24 🍴	18 🔨	Apache License 2.0
MicroLite ORM framework
LimeBean	Nick-Lucas	28 ⭐	5 🍴	10 🔨	MIT License
Hybrid-ORM for .NET

Other Lists

Name	Owner	Stars	Forks	Issues	License
awesome-dotnet-core	thangchung	19136 ⭐	2827 🍴	157 🔨	undefined
:honeybee: A collection of awesome .NET core libraries, tools, frameworks and software
awesome-ddd	heynickc	10725 ⭐	1319 🍴	3 🔨	undefined
A curated list of Domain-Driven Design (DDD), Command Query Responsibility Segregation (CQRS), Event Sourcing, and Event Storming resources
awesome-unity	RyanNielson	6346 ⭐	690 🍴	23 🔨	Creative Commons Zero v1.0 Universal
A curated list of awesome Unity assets, resources, and more.
C-Sharp-Algorithms	aalhour	5799 ⭐	1374 🍴	51 🔨	MIT License
:books: :chart_with_upwards_trend: Plug-and-play class-library project of standard Data Structures and Algorithms in C#
awesome-dot-net-performance	adamsitnik	3081 ⭐	270 🍴	8 🔨	MIT License
A curated list of awesome .NET Performance books, courses, trainings, conference talks, blogs and most inspiring open source contributors. Inspired by awesome-... stuff.
Awesome-Microservices-DotNet	mjebrahimi	2573 ⭐	361 🍴	5 🔨	Creative Commons Zero v1.0 Universal
💎 A collection of awesome training series, articles, videos, books, courses, sample projects, and tools for Microservices in .NET
awesome-xamarin	XamSome	1862 ⭐	285 🍴	1 🔨	GNU General Public License v3.0
A collection of interesting libraries/tools for Xamarin mobile projects
net-libraries-that-make-your-life-easier	tallesl	793 ⭐	127 🍴	1 🔨	undefined
Open Source .NET libraries that make your life easier.
dotnet-console-games	dotnet	744 ⭐	112 🍴	10 🔨	MIT License
Game examples implemented as .NET console applications primarily for providing education and inspiration. :)
awesome-roslyn	ironcev	633 ⭐	59 🍴	14 🔨	undefined
Curated list of awesome Roslyn books, tutorials, open-source projects, analyzers, code fixes, refactorings, and source generators
awesome-analyzers	cybermaxs	481 ⭐	34 🍴	6 🔨	undefined
A curated list of .NET Compiler Platform ("Roslyn") diagnostic analyzers and code fixes. Everyone can contribute here!
awesome-linq	aloisdg	396 ⭐	50 🍴	6 🔨	Creative Commons Zero v1.0 Universal
A curated collection of awesome LINQ libraries, tools, and more.
ANCLAFS	jpsingleton	209 ⭐	39 🍴	0 🔨	Creative Commons Zero v1.0 Universal
ASP.NET Core Library and Framework Support

Package Management

Name	Owner	Stars	Forks	Issues	License
Paket	fsprojects	1982 ⭐	516 🍴	772 🔨	MIT License
A dependency manager for .NET with support for NuGet packages and Git repositories.

Parser Library

Name	Owner	Stars	Forks	Issues	License
Sprache	sprache	2253 ⭐	214 🍴	22 🔨	MIT License
A tiny, friendly, C# parser construction library
superpower	datalust	968 ⭐	93 🍴	11 🔨	Apache License 2.0
A C# parser construction toolkit with high-quality error reporting
Pidgin	benjamin-hodgson	827 ⭐	60 🍴	11 🔨	MIT License
A lightweight and fast parsing library for C#.
fparsec	stephan-tolksdorf	507 ⭐	45 🍴	26 🔨	undefined
A parser combinator library for F#
csly	b3b00	332 ⭐	30 🍴	0 🔨	MIT License
a C# embeddable lexer and parser generator (.Net core)
parakeet	ara3d	52 ⭐	4 🍴	0 🔨	MIT License
A fast and simple .NET parsing library

PDF

Name	Owner	Stars	Forks	Issues	License
itextsharp	itext	1336 ⭐	461 🍴	2 🔨	Other
[DEPRECATED] .NET port of the iText library, only security fixes will be added — please use iText for .NET
PdfiumViewer	pvginkel	934 ⭐	400 🍴	70 🔨	Apache License 2.0
PDF viewer based on Google's PDFium.
wkhtmltopdf	codaxy	263 ⭐	92 🍴	6 🔨	undefined
C# wrapper around excellent wkhtmltopdf console utility.
Kevsoft.PDFtk	kevbite	29 ⭐	8 🍴	2 🔨	MIT License
.NET Library to drive the awesome PDFtk binary.
QPdfSharp	svengeance	9 ⭐	1 🍴	0 🔨	MIT License
A C# wrapper written around QPDF, allowing for various operations on PDF documents: transformations, page manipulation, linearization, and more.

Profiler

Name	Owner	Stars	Forks	Issues	License
dotnet	MiniProfiler	2849 ⭐	589 🍴	71 🔨	MIT License
A simple but effective mini-profiler for ASP.NET (and Core) websites
Glimpse	Glimpse	2319 ⭐	418 🍴	68 🔨	Apache License 2.0
The open source diagnostics platform for the web
Unchase.FluentPerformanceMeter	unchase	40 ⭐	3 🍴	0 🔨	Apache License 2.0
:hammer: Make the exact performance measurements of the public methods for public classes using this NuGet Package with fluent interface. Requires .Net Standard 2.0+. It is an Open Source project under Apache-2.0 License.

Protocols

Name	Owner	Stars	Forks	Issues	License
SSH.NET	sshnet	3749 ⭐	896 🍴	466 🔨	MIT License
SSH.NET is a Secure Shell (SSH) library for .NET, optimized for parallelism.
FluentFTP	robinrodricks	2925 ⭐	633 🍴	8 🔨	MIT License
An FTP and FTPS client for .NET & .NET Standard, optimized for speed. Provides extensive FTP commands, File uploads/downloads, SSL/TLS connections, Automatic directory listing parsing, File hashing/checksums, File permissions/CHMOD, FTP proxies, FXP support, UTF-8 support, Async/await support, Powershell support and more. Written entirely in C#.
DnsClient.NET	MichaCo	747 ⭐	128 🍴	16 🔨	Apache License 2.0
DnsClient.NET is a simple yet very powerful and high performant open source library for the .NET Framework to do DNS lookups
dns	kapetan	403 ⭐	127 🍴	20 🔨	MIT License
A DNS library written in C#

Push Notifications

Name	Owner	Stars	Forks	Issues	License
PushSharp	Redth	4381 ⭐	1528 🍴	211 🔨	Other
A server-side library for sending Push Notifications to iOS (iPhone/iPad APNS), Android (C2DM and GCM - Google Cloud Message), Windows Phone, Windows 8, Amazon, Blackberry, and (soon) FirefoxOS devices!

Queue

Name	Owner	Stars	Forks	Issues	License
Hangfire	HangfireIO	8977 ⭐	1656 🍴	852 🔨	Other
An easy way to perform background job processing in .NET and .NET Core applications. No Windows Service or separate process required
MassTransit	MassTransit	6469 ⭐	1567 🍴	7 🔨	Apache License 2.0
Distributed Application Framework for .NET
CAP	dotnetcore	6416 ⭐	1260 🍴	4 🔨	MIT License
Distributed transaction solution in micro-service base on eventually consistency, also an eventbus with Outbox pattern
netmq	zeromq	2867 ⭐	728 🍴	114 🔨	Other
A 100% native C# implementation of ZeroMQ for .NET
EasyNetQ	EasyNetQ	2845 ⭐	746 🍴	75 🔨	MIT License
An easy to use .NET API for RabbitMQ
confluent-kafka-dotnet	confluentinc	2725 ⭐	834 🍴	543 🔨	Apache License 2.0
Confluent's Apache Kafka .NET client
Rebus	rebus-org	2224 ⭐	351 🍴	6 🔨	Other
:bus: Simple and lean service bus implementation for .NET
NServiceBus	Particular	2042 ⭐	645 🍴	247 🔨	Other
Build, version, and monitor better microservices with the most powerful service platform for .NET
rabbitmq-dotnet-client	rabbitmq	2021 ⭐	560 🍴	48 🔨	Other
RabbitMQ .NET client for .NET Standard 2.0+ and .NET 4.6.2+
Brighter	BrighterCommand	1951 ⭐	257 🍴	54 🔨	MIT License
A framework for building messaging apps with .NET and C#.
Foundatio	FoundatioFx	1905 ⭐	239 🍴	28 🔨	Apache License 2.0
Pluggable foundation blocks for building distributed apps.
RawRabbit	pardahlman	743 ⭐	143 🍴	58 🔨	MIT License
A modern .NET framework for communication over RabbitMq
Gofer.NET	brthor	533 ⭐	49 🍴	16 🔨	MIT License
Easy C# API for Distributed Background Tasks/Jobs for .NET Core.
SlimMessageBus	zarusz	431 ⭐	71 🍴	23 🔨	Apache License 2.0
Lightweight message bus interface for .NET (pub/sub and request-response) with transport plugins for popular message brokers.
RestBus	tenor	366 ⭐	56 🍴	16 🔨	Apache License 2.0
Easy, Service Oriented, Asynchronous Messaging and Queueing for .NET
Warewolf	Warewolf-ESB	266 ⭐	120 🍴	12 🔨	undefined
Effortless Microservice Design and Integration. This repository includes the code-base for the Warewolf Studio and Server.
kafunk	jet	161 ⭐	63 🍴	23 🔨	Other
Kafunk: F# Kafka client

Reactive Programming

Name	Owner	Stars	Forks	Issues	License
reactive	dotnet	6454 ⭐	722 🍴	160 🔨	MIT License
The Reactive Extensions for .NET
DynamicData	reactivemarbles	1654 ⭐	178 🍴	17 🔨	MIT License
Reactive collections based on Rx.Net
ObservableComputations	IgorBuchelnikov	108 ⭐	8 🍴	4 🔨	MIT License
Cross-platform .NET library for computations whose arguments and results are objects that implement INotifyPropertyChanged and INotifyCollectionChanged (ObservableCollection) interfaces.

Real-time Communications

Name	Owner	Stars	Forks	Issues	License
sipsorcery	sipsorcery-org	1293 ⭐	393 🍴	159 🔨	Other
A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.

Regular Expression

Name	Owner	Stars	Forks	Issues	License
RegExtract	sblom	696 ⭐	17 🍴	7 🔨	MIT License
Clean & simple idiomatic C# RegEx-based line parser that emits strongly typed results.
Gigantor	imagibee	11 ⭐	1 🍴	0 🔨	MIT License
Works in conjunction with System.Text.RegularExpressions.Regex to boost performance, add a replace function, and support gigantic files that exceed RAM

RPC

Name	Owner	Stars	Forks	Issues	License
grpcurl	fullstorydev	10038 ⭐	484 🍴	89 🔨	MIT License
Like cURL, but for gRPC: Command-line tool for interacting with gRPC servers
bloomrpc	bloomrpc	9013 ⭐	464 🍴	0 🔨	GNU Lesser General Public License v3.0
Former GUI client for gRPC services. No longer maintained.
grpcui	fullstorydev	4851 ⭐	366 🍴	60 🔨	MIT License
An interactive web UI for gRPC, along the lines of postman
grpc-dotnet	grpc	4010 ⭐	735 🍴	113 🔨	Apache License 2.0
gRPC for .NET
CoreRPC	kekekeks	76 ⭐	17 🍴	1 🔨	MIT License
Extensible RPC library with Typescript client generator

Scheduling

Name	Owner	Stars	Forks	Issues	License
quartznet	quartznet	6185 ⭐	1651 🍴	122 🔨	Apache License 2.0
Quartz Enterprise Scheduler .NET
workflow-core	danielgerlag	5043 ⭐	1133 🍴	314 🔨	MIT License
Lightweight workflow engine for .NET Standard
FluentScheduler	fluentscheduler	2646 ⭐	405 🍴	50 🔨	Other
Automated job scheduler with fluent interface for the .NET platform.
durabletask	Azure	1424 ⭐	279 🍴	235 🔨	Apache License 2.0
Durable Task Framework allows users to write long running persistent workflows in C# using the async/await capabilities.
NCrontab	atifaziz	865 ⭐	134 🍴	24 🔨	Apache License 2.0
Crontab for .NET
Chroniton	leosperry	180 ⭐	18 🍴	16 🔨	MIT License
A library for running tasks(jobs) on schedules.
NCrontab.Scheduler	thomasgalliker	14 ⭐	1 🍴	4 🔨	undefined
NCrontab.Scheduler is a simple, open source task scheduling system that can be used in any .NET application

SDK and API Clients

Name	Owner	Stars	Forks	Issues	License
azure-powershell	Azure	4036 ⭐	3698 🍴	1274 🔨	Other
Microsoft Azure PowerShell
octokit.net	octokit	2593 ⭐	1064 🍴	56 🔨	MIT License
A GitHub API client library for .NET
aws-sdk-net	aws	2002 ⭐	846 🍴	136 🔨	Apache License 2.0
The official AWS SDK for .NET. For more information on the AWS SDK for .NET, see our web site:
dropbox-sdk-dotnet	dropbox	329 ⭐	469 🍴	46 🔨	MIT License
The Official Dropbox API V2 SDK for .NET
gettyimages-api_dotnet	gettyimages	10 ⭐	7 🍴	1 🔨	MIT License
Getty Images API SDK - .NET

Search

Name	Owner	Stars	Forks	Issues	License
elasticsearch-net	elastic	3518 ⭐	1138 🍴	108 🔨	Apache License 2.0
This strongly-typed, client library enables working with Elasticsearch. It is the official client maintained and supported by Elastic.
SolrNet	SolrNet	929 ⭐	797 🍴	95 🔨	Apache License 2.0
Solr client for .Net
PlainElastic.Net	Yegoroff	160 ⭐	80 🍴	15 🔨	MIT License
Plain .Net client for ElasticSearch
solr-express	solr-express	66 ⭐	21 🍴	27 🔨	MIT License
A simple and lightweight query .NET library for Solr, in a controlled, buildable and fail fast way.

Serialization

Name	Owner	Stars	Forks	Issues	License
Newtonsoft.Json	JamesNK	10486 ⭐	3216 🍴	754 🔨	MIT License
Json.NET is a popular high-performance JSON framework for .NET
protobuf-net	protobuf-net	4504 ⭐	1030 🍴	487 🔨	Other
Protocol Buffers library for idiomatic .NET
bond	microsoft	2571 ⭐	317 🍴	145 🔨	MIT License
Bond is a cross-platform framework for working with schematized data. It supports cross-language de/serialization and powerful generic mechanisms for efficiently manipulating data. Bond is broadly used at Microsoft in high scale services.
Utf8Json	neuecc	2344 ⭐	262 🍴	174 🔨	MIT License
Definitely Fastest and Zero Allocation JSON Serializer for C#(NET, .NET Core, Unity, Xamarin).
Jil	kevin-montrose	2144 ⭐	258 🍴	48 🔨	MIT License
Fast .NET JSON (De)Serializer, Built On Sigil
ServiceStack.Text	ServiceStack	1218 ⭐	631 🍴	13 🔨	Other
.NET's fastest JSON, JSV and CSV Text Serializers
FileHelpers	MarcosMeli	1118 ⭐	343 🍴	120 🔨	MIT License
The FileHelpers are a free and easy to use .NET library to read/write data from fixed length or delimited records in files, strings or streams
msgpack-cli	msgpack	821 ⭐	177 🍴	82 🔨	Apache License 2.0
MessagePack implementation for Common Language Infrastructure / msgpack.org[C#]
FlatSharp	jamescourtney	480 ⭐	50 🍴	9 🔨	Apache License 2.0
Fast, idiomatic C# implementation of Flatbuffers
Ceras	rikimaru0345	475 ⭐	53 🍴	39 🔨	MIT License
Universal binary serializer for a wide variety of scenarios https://discord.gg/FGaCX4c
ObjectDumper	thomasgalliker	373 ⭐	39 🍴	13 🔨	undefined
ObjectDumper is a utility which aims to serialize C# objects to string for debugging and logging purposes.
FsPickler	mbraceproject	321 ⭐	54 🍴	13 🔨	MIT License
A fast multi-format message serializer for .NET
protobuf	silentorbit	297 ⭐	109 🍴	2 🔨	MIT License
C# code generator for reading and writing the protocol buffers format
Hyperion	akkadotnet	278 ⭐	63 🍴	64 🔨	Apache License 2.0
Polymorphic serialization for .NET
CsvExport	jitbit	139 ⭐	59 🍴	0 🔨	undefined
Very simple CSV-export tool for C#
Migrant	antmicro	45 ⭐	17 🍴	6 🔨	MIT License
Fast and flexible serialization framework usable on undecorated classes.
FluentSerializer	Marvin-Brouwer	19 ⭐	1 🍴	29 🔨	Apache License 2.0
A fluent take on serializer libraries

SMS and Phone calls

Name	Owner	Stars	Forks	Issues	License
twilio-csharp	twilio	652 ⭐	296 🍴	41 🔨	MIT License
Twilio C#/.NET Helper Library for .NET6+.

Source Generator

Name	Owner	Stars	Forks	Issues	License
Enum.Source.Generator	EngRajabi	159 ⭐	13 🍴	3 🔨	MIT License
A C# source generator to create an enumeration class from an enum type. With this package, you can work on enums very, very fast without using reflection.
M31.FluentAPI	m31coding	61 ⭐	0 🍴	1 🔨	MIT License
Generate fluent APIs for your C# classes with ease.

State machines

Name	Owner	Stars	Forks	Issues	License
stateless	dotnet-state-machine	5282 ⭐	740 🍴	71 🔨	Other
A simple library for creating state machines in C# code
Automatonymous	MassTransit	727 ⭐	117 🍴	3 🔨	Apache License 2.0
A state machine library for .Net - 100% code - No doodleware
LiquidState	prasannavl	235 ⭐	29 🍴	6 🔨	Apache License 2.0
Efficient asynchronous and synchronous state machines for .NET

Static Site Generators

Name	Owner	Stars	Forks	Issues	License
pretzel	Code52	601 ⭐	170 🍴	38 🔨	Microsoft Public License
A site generation tool (and then some) for .NET platforms
Sandra.Snow	Sandra	235 ⭐	61 🍴	17 🔨	MIT License
Jekyll inspired static site generation for .NET

Strong Naming

Name	Owner	Stars	Forks	Issues	License
strongnamer	dsplaisted	324 ⭐	52 🍴	40 🔨	MIT License
StrongNameSigner	brutaldev	316 ⭐	67 🍴	0 🔨	Other
Strong-name sign third party .NET assemblies without the source code.

Template Engine

Name	Owner	Stars	Forks	Issues	License
scriban	scriban	2886 ⭐	337 🍴	43 🔨	BSD 2-Clause "Simplified" License
A fast, powerful, safe and lightweight scripting language and engine for .NET
RazorEngine	Antaris	2122 ⭐	577 🍴	178 🔨	Other
Open source templating engine based on Microsoft's Razor parsing engine
RazorLight	toddams	1480 ⭐	257 🍴	74 🔨	Apache License 2.0
Template engine based on Microsoft's Razor parsing engine for .NET Core
fluid	sebastienros	1287 ⭐	167 🍴	77 🔨	MIT License
Fluid is an open-source .NET template engine based on the Liquid template language.
Handlebars.Net	Handlebars-Net	1147 ⭐	212 🍴	46 🔨	MIT License
A real .NET Handlebars engine
dotliquid	dotliquid	1035 ⭐	293 🍴	51 🔨	Other
.NET Port of Tobias Lütke's Liquid template language.
SmartFormat	axuno	1023 ⭐	101 🍴	2 🔨	Other
A lightweight text templating library written in C# which can be a drop-in replacement for string.Format
Nustache	jdiamond	587 ⭐	123 🍴	22 🔨	MIT License
Logic-less templates for .NET
Stubble	StubbleOrg	386 ⭐	57 🍴	12 🔨	Other
Trimmed down {{mustache}} templates in .NET
mustache-sharp	jehugaleahsa	305 ⭐	80 🍴	44 🔨	The Unlicense
An extension of the mustache text template engine for .NET.
morestachio	JPVenson	48 ⭐	12 🍴	2 🔨	Other
Lightweight, powerful, flavorful, template engine.

Testing

Name	Owner	Stars	Forks	Issues	License
Bogus	bchavez	8190 ⭐	463 🍴	51 🔨	Other
:card_index: A simple fake data generator for C#, F#, and VB.NET. Based on and ported from the famed faker.js.
moq	devlooped	5651 ⭐	791 🍴	61 🔨	Other
The most popular and friendly mocking framework for .NET
xunit	xunit	4000 ⭐	754 🍴	111 🔨	Other
xUnit.net is a free, open source, community-focused unit testing tool for .NET.
fluentassertions	fluentassertions	3573 ⭐	533 🍴	111 🔨	Apache License 2.0
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3.
testcontainers-dotnet	testcontainers	3498 ⭐	237 🍴	35 🔨	MIT License
A library to support tests with throwaway instances of Docker containers for all compatible .NET Standard versions.
AutoFixture	AutoFixture	3209 ⭐	335 🍴	50 🔨	MIT License
AutoFixture is an open source library for .NET designed to minimize the 'Arrange' phase of your unit tests in order to maximize maintainability. Its primary goal is to allow developers to focus on what is being tested rather than how to setup the test scenario, by making it easier to create object graphs containing test data.
nunit	nunit	2449 ⭐	714 🍴	326 🔨	MIT License
NUnit Framework
Verify	VerifyTests	2311 ⭐	123 🍴	4 🔨	MIT License
Verify is a snapshot tool that simplifies the assertion of complex data models and documents.
SpecFlow	SpecFlowOSS	2200 ⭐	748 🍴	275 🔨	Other
#1 .NET BDD Framework. SpecFlow automates your testing & works with your existing code. Find Bugs before they happen. Behavior Driven Development helps developers, testers, and business representatives to get a better understanding of their collaboration
NBomber	PragmaticFlow	2021 ⭐	126 🍴	56 🔨	Other
Modern and flexible load testing framework for Pull and Push scenarios, designed to test any system regardless a protocol (HTTP/WebSockets/AMQP etc) or a semantic model (Pull/Push).
shouldly	shouldly	1971 ⭐	376 🍴	76 🔨	Other
Should testing for .NET—the way assertions should be!
stryker-net	stryker-mutator	1697 ⭐	170 🍴	175 🔨	Apache License 2.0
Mutation testing for .NET core and .NET framework!
FakeItEasy	FakeItEasy	1620 ⭐	178 🍴	27 🔨	MIT License
The easy mocking library for .NET
NetArchTest	BenMorris	1227 ⭐	72 🍴	16 🔨	MIT License
A fluent API for .Net that can enforce architectural rules in unit tests.
FsCheck	fscheck	1132 ⭐	153 🍴	27 🔨	BSD 3-Clause "New" or "Revised" License
Random Testing for .NET
Compare-Net-Objects	GregFinzer	1019 ⭐	184 🍴	1 🔨	Microsoft Public License
What you have been waiting for 👍 Perform a deep compare of any two .NET objects using reflection. Shows the differences between the two objects.
machine.specifications	machine	883 ⭐	177 🍴	32 🔨	MIT License
Machine.Specifications is a Context/Specification framework for .NET that removes language noise and simplifies tests.
ArchUnitNET	TNG	745 ⭐	47 🍴	18 🔨	Apache License 2.0
A C# architecture test library to specify and assert architecture rules in C# for automated testing.
expecto	haf	647 ⭐	95 🍴	57 🔨	Apache License 2.0
A smooth testing lib for F#. APIs made for humans! Strong testing methodologies for everyone!
canopy	lefthandedgoat	502 ⭐	117 🍴	27 🔨	MIT License
f# web automation and testing library, built on top of Selenium (friendly to c# also)
TestStack.BDDfy	TestStack	414 ⭐	82 🍴	75 🔨	MIT License
BDDfy is the simplest BDD framework EVER!
xbehave.net	adamralph	381 ⭐	46 🍴	16 🔨	MIT License
✖ An xUnit.net extension for describing each step in a test with natural language.
snapshooter	SwissLife-OSS	284 ⭐	28 🍴	55 🔨	MIT License
Snapshooter is a snapshot testing tool for .NET Core and .NET Framework
rhino-mocks	ayende	256 ⭐	147 🍴	14 🔨	BSD 3-Clause "New" or "Revised" License
Dynamic Mocking Framework for .NET
FluentAutomation	stirno	233 ⭐	99 🍴	50 🔨	MIT License
Simple Fluent API for UI Automation
Moq.Contrib.HttpClient	maxkagamine	185 ⭐	12 🍴	2 🔨	MIT License
A set of extension methods for mocking HttpClient and IHttpClientFactory with Moq.
ExpressionToCode	EamonNerbonne	155 ⭐	29 🍴	10 🔨	Apache License 2.0
Generates valid, readable C# from an Expression Tree.
Fuchu	mausch	120 ⭐	22 🍴	18 🔨	Apache License 2.0
Functional test library for F# / C# / VB.NET
CsCheck	AnthonyLloyd	118 ⭐	3 🍴	0 🔨	Apache License 2.0
Random testing library for C#
nbuilder	garethdown44	52 ⭐	9 🍴	0 🔨	undefined
Rapid generation of test objects in .NET
sectester-net	NeuraLegion	1 ⭐	3 🍴	2 🔨	MIT License
SecTester is a new tool that integrates our enterprise-grade scan engine directly into your unit tests.

Tools

Name	Owner	Stars	Forks	Issues	License
prettier	prettier	48086 ⭐	4093 🍴	1346 🔨	MIT License
Prettier is an opinionated code formatter.
AnotherRedisDesktopManager	qishibo	28782 ⭐	2472 🍴	237 🔨	MIT License
🚀🚀🚀A faster, better and more stable Redis desktop manager [GUI client], compatible with Linux, Windows, Mac.
ShareX	ShareX	27440 ⭐	3055 🍴	554 🔨	GNU General Public License v3.0
ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to many supported destinations you can choose from.
CodeHub	CodeHubApp	22893 ⭐	622 🍴	237 🔨	undefined
CodeHub is an iOS application written using Xamarin
reverse-proxy	microsoft	7953 ⭐	780 🍴	151 🔨	MIT License
A toolkit for developing high-performance HTTP reverse proxy applications.
OctoLinker	OctoLinker	5235 ⭐	280 🍴	62 🔨	MIT License
OctoLinker — Links together, what belongs together
NETworkManager	BornToBeRoot	4453 ⭐	540 🍴	27 🔨	GNU General Public License v3.0
A powerful tool for managing networks and troubleshoot network problems!
Opserver	opserver	4449 ⭐	821 🍴	75 🔨	MIT License
Stack Exchange's Monitoring System
VisualStudioUninstaller	microsoft	3903 ⭐	569 🍴	44 🔨	Other
Visual Studio Uninstallation sometimes can be unreliable and often leave out a lot of unwanted artifacts. Visual Studio Uninstaller is designed to thoroughly and reliably remove these unwanted artifacts.
cli	dotnet	3495 ⭐	1074 🍴	0 🔨	undefined
The .NET Core command-line (CLI) tools, used for building .NET Core apps and libraries through your development flow (compiling, NuGet package management, running, testing, ...).
Papercut-SMTP	ChangemakerStudios	2771 ⭐	261 🍴	48 🔨	undefined
Papercut SMTP -- The Simple Desktop Email Server
OpenLiveWriter	OpenLiveWriter	2448 ⭐	489 🍴	510 🔨	Other
An open source fork of Windows Live Writer
UnitsNet	angularsen	2121 ⭐	357 🍴	59 🔨	MIT No Attribution
Makes life working with units of measurement just a little bit better.
myrtille	cedrozor	1704 ⭐	367 🍴	63 🔨	Apache License 2.0
A native HTML4 / HTML5 Remote Desktop Protocol and SSH client
Netling	hallatore	1340 ⭐	209 🍴	13 🔨	MIT License
Netling is a load tester client for easy web testing.
Downloader	bezzad	1165 ⭐	180 🍴	14 🔨	MIT License
Fast, cross-platform and reliable multipart downloader with asynchronous progress events for .NET applications.
csharpier	belav	1083 ⭐	71 🍴	136 🔨	MIT License
CSharpier is an opinionated code formatter for c#.
SmartCode	dotnetcore	566 ⭐	164 🍴	18 🔨	Apache License 2.0
SmartCode = IDataSource -> IBuildTask -> IOutput => Build Everything!!!
dotnet-fake-json-server	ttu	378 ⭐	79 🍴	8 🔨	MIT License
Fake JSON Server is a Fake REST API that can be used as a Back End for prototyping or as a template for a CRUD Back End.
OctaneDownloader	gregyjames	206 ⭐	36 🍴	5 🔨	MIT License
A high performance, multi-threaded C# file download library.
posh-dotnet	bergmeister	44 ⭐	1 🍴	3 🔨	GNU General Public License v3.0
PowerShell tab completion and tooltip support for the dotnet CLI.

Trading

Name	Owner	Stars	Forks	Issues	License
Lean	QuantConnect	8608 ⭐	3055 🍴	210 🔨	Apache License 2.0
Lean Algorithmic Trading Engine by QuantConnect (Python, C#)
StockSharp	StockSharp	6561 ⭐	1663 🍴	8 🔨	Apache License 2.0
Algorithmic trading and quantitative trading open source platform to develop trading robots (stock markets, forex, crypto, bitcoins, and options).

UI Automation

Name	Owner	Stars	Forks	Issues	License
puppeteer-sharp	hardkoded	3126 ⭐	419 🍴	138 🔨	MIT License
Headless Chrome .NET API
FlaUI	FlaUI	2066 ⭐	347 🍴	204 🔨	MIT License
UI automation library for .Net
atata	atata-framework	475 ⭐	77 🍴	8 🔨	Apache License 2.0
C#/.NET test automation framework for web
puppeteer-sharp-contrib	hlaueriksson	79 ⭐	14 🍴	0 🔨	MIT License
Contributions to the Headless Chrome .NET API 🌐🧪

Visual Studio Plugins

Name	Owner	Stars	Forks	Issues	License
NSwag	RicoSuter	6449 ⭐	1209 🍴	1837 🔨	MIT License
The Swagger/OpenAPI toolchain for .NET, ASP.NET Core and TypeScript.
VsVim	VsVim	3581 ⭐	390 🍴	292 🔨	Other
Vim Emulator Plugin for Visual Studio 2015+
roslynator	dotnet	2949 ⭐	242 🍴	150 🔨	Other
Roslynator is a set of code analysis tools for C#, powered by Roslyn.
CodeContracts	microsoft	876 ⭐	151 🍴	218 🔨	Other
Source code for the CodeContracts tools for .NET
side-waffle	ligershark	656 ⭐	206 🍴	35 🔨	Other
A collection of Item- and Project Templates for Visual Studio
sonarlint-visualstudio	SonarSource	446 ⭐	77 🍴	253 🔨	GNU Lesser General Public License v3.0
SonarLint extension for VisualStudio
GitDiffMargin	laurentkempe	287 ⭐	40 🍴	60 🔨	MIT License
Git Diff Margin displays live Git changes of the currently edited file on Visual Studio margin and scroll bar. Supports Visual Studio 2012 through Visual Studio 2022
Unchase.OpenAPI.Connectedservice	unchase	100 ⭐	16 🍴	4 🔨	Apache License 2.0
:scroll: Visual Studio extension to generate OpenAPI (Swagger) web service reference.
WebEssentials2019	madskristensen	49 ⭐	8 🍴	11 🔨	Other
Unchase.Odata.Connectedservice	unchase	44 ⭐	12 🍴	21 🔨	Apache License 2.0
:scroll: A Visual Studio extension for connecting to OData services with generating client-side C# proxy-classes

Web Frameworks

Name	Owner	Stars	Forks	Issues	License
Nancy	NancyFx	7160 ⭐	1467 🍴	220 🔨	MIT License
Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono
Giraffe	giraffe-fsharp	2044 ⭐	264 🍴	52 🔨	Apache License 2.0
A native functional ASP.NET Core web framework for F# developers.
iisnode	tjanczuk	1837 ⭐	589 🍴	266 🔨	Other
Hosting node.js applications in IIS on Windows
dotvvm	riganti	732 ⭐	95 🍴	157 🔨	Apache License 2.0
Open source MVVM framework for Web Apps
fubumvc	DarthFubuMVC	425 ⭐	151 🍴	89 🔨	Other
A front-controller style MVC framework for .NET

Web Servers

Name	Owner	Stars	Forks	Issues	License
embedio	unosquare	1422 ⭐	167 🍴	50 🔨	Other
A tiny, cross-platform, module based web server for .NET
xsp	mono	193 ⭐	90 🍴	3 🔨	Other
Mono's ASP.NET hosting server. This module includes an Apache Module, a FastCGI module that can be hooked to other web servers as well as a standalone server used for testing (similar to Microsoft's Cassini)
SimpleW	stratdev3	19 ⭐	1 🍴	0 🔨	MIT License
SimpleW is a Simple Web Server library in NET (windows/linux/macos). It provides a cross-plateform framework for building web applications.

WebSocket

Name	Owner	Stars	Forks	Issues	License
SignalR	SignalR	9073 ⭐	2274 🍴	43 🔨	Other
Incredibly simple real-time web for .NET
websocket-sharp	sta	5495 ⭐	1625 🍴	552 🔨	MIT License
A C# implementation of the WebSocket protocol client and server
SuperSocket	kerryjiang	3773 ⭐	1124 🍴	222 🔨	Apache License 2.0
SuperSocket is a light weight, cross platform and extensible socket server application framework.
Fleck	statianzo	2212 ⭐	580 🍴	72 🔨	MIT License
C# Websocket Implementation
NetGain	StackExchange	931 ⭐	141 🍴	15 🔨	MIT License
A high performance websocket server library powering Stack Overflow.
websocket-client	Marfusios	648 ⭐	121 🍴	56 🔨	MIT License
🔧 .NET/C# websocket client library
WampSharp	Code-Sharp	383 ⭐	86 🍴	36 🔨	Other
A C# implementation of WAMP (The Web Application Messaging Protocol)
Websockets.PCL	NVentimiglia	97 ⭐	36 🍴	25 🔨	MIT License
C# Websockets for all platforms using native bridges

Windows Services

Name	Owner	Stars	Forks	Issues	License
Topshelf	Topshelf	3573 ⭐	680 🍴	0 🔨	Apache License 2.0
An easy service hosting framework for building Windows services using .NET

WPF

Name	Owner	Stars	Forks	Issues	License
wpf	dotnet	6781 ⭐	1120 🍴	1152 🔨	MIT License
WPF is a .NET Core UI framework for building Windows desktop applications.
wpftoolkit	xceedsoftware	3744 ⭐	863 🍴	768 🔨	Other
All the controls missing in WPF. Over 1 million downloads.
DataGridExtensions	dotnet	761 ⭐	98 🍴	7 🔨	MIT License
Modular extensions for the WPF DataGrid control
DeftSharp.Windows.Input	Empiree	29 ⭐	5 🍴	8 🔨	MIT License
A .NET library designed to control and manage the keyboard and mouse in Windows.