Merge pull request #321 from slauzon/patch-1

Added XCP-ng to virtualization software

README.md

@@ -623,6 +623,7 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
 * [QEMU](http://www.qemu.org/) - QEMU is a generic machine emulator and virtualizer.
 * [Vagrant](https://www.vagrantup.com/) - Tool for building complete development environments.
 * [VirtualBox](https://www.virtualbox.org/) - Virtualization product from Oracle Corporation.
+* [XCP-ng](http://www.xcp-ng.org/) - Based on Citrix XenServer, XCP-ng is a fully open source virtualization platform.
 * [Xen](http://www.xenproject.org/) - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.
 * [XenServer](http://xenserver.org/) - Turnkey virtualization platform based on CentOS distribution, using Xen and an extended toolstack/API.