mGSTEP port of the Cube game engine
FreeCS is a free-software reimplementation of Counter-Strike 1.5.
X3D Prototypes for the SMUOS Component
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Java decentralized cross-platform network multiplayer game engine
Free strategy browsergame engine.
Library for creating turn-based games with simultaneous moves.
Minecraft side viewed game made in Java
Open Source Virtual World and MMOG Development Platform
An HTML web game platform