Open-Source Classic Tetris
Take the chess graphism, and use it with a chess engine.
FreeTown is a city simulator game.
A mobile tower 3D tower defense/defend the flag game
Dots and Boxes for 6 players / Käsekästchen für sechs Spieler
A panographic toolkit compliant with open source standards
A world editor for HGE game engine written in python and uses OpenGL.
Graph algorithms interpreter, IDE, debugger, 3D visualizations.
Cross platform administration tool for Source Engine dedicated servers
An experimental 4X space strategy game design
The original Xivio.com World Server Core
Minecraft private Skin Center
A 3D, fully concurrent game engine
Multiplayer geography game.