A powerful HTML, C#, PHP editor for windows
XNA based game engine completely written in c#
An expanded XNA game creation framework
A cross-platform game framework based on OpenGL and GObject.
https://github.com/horde3d/Horde3D
A continuation of the abandoned Tao Framework project.
Multi-Language Wrapper Collection for the Irrlicht Engine
A Tetris Clone in 3D made with Unity