Open Source MMORPG Framework
Unity3D Client And C# Server Framework
Arianne is an engine to develop multiplayer online games like Stendhal
JavaScript framework to build game engines, games, emulators and apps
Java Settlers
Cinema Enters Game Console
Asphyre is a cross-platform framework for Delphi and FreePascal.
A starter development kit that let you develop FF6-like games on PC.
3D .NET engine for Windows, Linux, Mac
AutoTeach makes kids study and learn in exchange for internet access.
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
An HTML web game platform
Game framework on top of Python, Panda3D and Twisted
Atlarius is no longer under development.