I am Jarek from Poland. I am a maintainer and lead developer on the following open source projects (since 2003):

• https://github.com/KDE/kexi - KEXI, a visual database applications builder. It can be used for designing database applications, inserting and editing data, performing queries, and processing data. Forms can be created to provide a custom interface to your data. All database objects – tables, queries, forms, reports – are stored in the database, making it easy to share data and design.
• https://github.com/KDE/kdb - KDb, a database connectivity and creation framework, consisted of a general-- purpose C++ Qt library and a set of plugins delivering support for various database vendors.
• https://github.com/KDE/kproperty - KProperty, a property editing framework with an editor widget similar to what is known from Qt Designer. It is useful in applications such as IDEs where large amounts of properties are available for the user to edit.
• https://github.com/KDE/kreport - The KReport framework, implements reporting functionality for the creation of reports in MS Access style. They are also similar to SAP Crystal Reports and FileMaker reports.

Sponsoring gives you the opportunity to boost the development of the above projects, and get features or fixes you need, faster! All funds will be used for the development projects and the process will be documented for you.

I am also the founder and former maintainer of the KDE on Windows project (formerly KDElibs for Windows).

Thanks for supporting my hard work on the open-source software!