Open Source Virtual World and MMOG Development Platform
cross-platform 2d game engine
Investigo - DX9 Performance and Debugging Toolkit
A cross-platform OpenGL based lightweight scenegraph library
AMOS BASIC reimplementation in Java
Sourceport of the classic Descent Level Editor
Cross-platform 2D game engine
A cross platform 3d c++ game engine
also download updates from files section
Read and write PGN format and test moves for legality.