Open source library for N64 development
SDL based generic 2D game engine
Source code of the chapters of the book 3D Game Development with LWJGL
Multidocument automation by templates - for sphinx, mkdocs, epydoc ...
3D .NET engine for Windows, Linux, Mac
Multimedia asset management and manipulator for Étoilé
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
The Lambda-Engine is a cross platform game engine.
Andruill Engine is a GMS (Game Management System) written in PHP.
The next generation mud is an open-source extensible, programmable mud