Desktop/Android/HTML5/iOS Java game development framework
A modular Common Lisp game engine
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A simple and easy-to-use library to enjoy videogames programming
A completely free, open-source, 2D game engine
Go 3D Game Engine
Cinema Enters Game Console
Modern 3D engine and IDE written using C# and C++.
Java Development Framework
Asphyre is a cross-platform framework for Delphi and FreePascal.
3D .NET engine for Windows, Linux, Mac
Educational framework for OpenGLES, OpenCL and OpenAL
A cross-platform game framework based on OpenGL and GObject.
Pear3DEngine is a modern and modular 3D development framework
Quake III Arena GPL Source Release