Game engine supporting many 3D/2D formats and graphic effects
X3D Prototypes for the SMUOS Component
Asphyre is a cross-platform framework for Delphi and FreePascal.
Multimedia asset management and manipulator for Étoilé
An open source skateboard games engine written in C# and .NET.
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
The next generation mud is an open-source extensible, programmable mud