Ze Text Adventure game Builder : Create as you play !
Small lightweight program to customize your keyboard
Portable game engine with main focus on point-and-click adventures
3D .NET engine for Windows, Linux, Mac
c# lua bind with unity3d project for game development
A cross-platform game framework based on OpenGL and GObject.
GameWizzard is a Sprite editor.
An open source skateboard games engine written in C# and .NET.
Open Source Virtual World and MMOG Development Platform
I am working on upgrading the XNA Platform Game Template.
Investigo - DX9 Performance and Debugging Toolkit
DREAM is an Open Source GCS
The source code for the UDK release of apoclyofable