3D game engine/framework in C, with Luajit and Python bindings now
A modern, cross-platform Quake game engine based on FitzQuake.
GemRB is a portable open-source implementation of the Infinity Engine
Game engine supporting many 3D/2D formats and graphic effects
C++ lightweight cross-platform game engine
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Chess program
DOOM / Heretic / Hexen source port with enhanced graphics and UI
Opensource Game Studio
Character animation system for games and simulations.
Free MMORPG
Portable game engine with main focus on point-and-click adventures
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Atari 2600, C64, Python, 3D engines and rock'n roll
Creates a shape file from a query
starrydb is game server engine
A 3D game engine in java.