One framework for creating powerful cross-platform games
Open source HTML5 game framework that offers WebGL and Canvas
Game engine supporting many 3D/2D formats and graphic effects
Cross-platform 2D and 3D game engine
CSG for jMonkey
Portable game engine with main focus on point-and-click adventures
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
Asphyre is a cross-platform framework for Delphi and FreePascal.
3D .NET engine for Windows, Linux, Mac
A game engine written in the D programming language
TurboSphere is an easy to learn and powerful JS based game engine.
A cross-platform game framework based on OpenGL and GObject.
2D Game Engine, based on OpenGL and focused on Isometric Games
3d lib
Pear3DEngine is a modern and modular 3D development framework
Multi-Language Wrapper Collection for the Irrlicht Engine
A cross-platform OpenGL based lightweight scenegraph library
Cross-platform 2D game engine
A cross platform 3d c++ game engine
Game framework on top of Python, Panda3D and Twisted