GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
A promising chess program
A game engine for console based text games
Character animation system for games and simulations.
scriptable game engine with built-in support for 2D graphics and sound
Java RTS framework
Pontoon in c - source code and header file
evolution for vegastrike SpaceSim/Combat/Trade game
Some pythons plugins to enhance fantasy maps creation with QGis
Diggo a 2D version of minecraft made with Pygame!
A ridiculously simple spaceship shoot 'em up game written in Python
TR Game Engine allows you to develop your game quickly and easily.
A simple game to analyse your skills in number guessing.