Odamex is a free, cross-platform, modern client-server Doom engine
0 A.D. is a free, open-source, cross-platform real-time strategy game.
Cross-platform real-time strategy game (3D)
Advanced map editor
NOOBS compatible distro image for wrapper around the XLink Kai Engine
Computer-assisted miniature tank game.
a PHP based leaderboard software for Battlefield 3
Minecraft private Skin Center
Mighty 34th century meka action from TeamXbow
Earthlead is a free massive multiplayer online browser strategy game.
Opensource serious game engine for multiplayer games