An updated version of the classic "Basic Computer Games" book
Stride (formerly Xenko), a free and open-source cross-platform C# game
Simple GTK# Paint Program
Modern 3D engine and IDE written using C# and C++.
3D .NET engine for Windows, Linux, Mac
Exciting Tic Tac Toe game full of features
Graphing calculator within the Windows desktop console
Logic game to train your memory