Open source HTML5 game framework that offers WebGL and Canvas
Game engine supporting many 3D/2D formats and graphic effects
Java Settlers
The imaginary eight-bit machine
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Educational framework for OpenGLES, OpenCL and OpenAL
Engines for Batch Games
Modular Gaming Open Source Persistent Browser Based Game Framework
Investigo - DX9 Performance and Debugging Toolkit
A generic C++ MUD server featuring a strategy-style hexagon map