Quake PAK file utility
Single-/multi-player card game Mau Mau (similar to UNO®)
Multimedia asset management and manipulator for Étoilé
A mobile tower 3D tower defense/defend the flag game
3D game engine for C and C++
A truly extensible cross-platform game engine
A very small multi-platform game engine for creating desktop games.
Pear3DEngine is a modern and modular 3D development framework
C++ Game programming Framework
Read and write PGN format and test moves for legality.