Gideros Release version
Arianne is an engine to develop multiplayer online games like Stendhal
Java Settlers
Source code of the chapters of the book 3D Game Development with LWJGL
Java decentralized cross-platform network multiplayer game engine
Multimedia asset management and manipulator for Étoilé
A multiplatform game engine for interactive fiction experiences
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
DiaT is a Textadventure
Andruill Engine is a GMS (Game Management System) written in PHP.
The next generation mud is an open-source extensible, programmable mud