FreeCS is a free-software reimplementation of Counter-Strike 1.5.
X3D Prototypes for the SMUOS Component
An open-source, multiplayer fps based on Cube 2 Engine.
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
MMOG Framework. Starting place to build a game.
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
c# game server framework