CTFs as you need them
Arianne is an engine to develop multiplayer online games like Stendhal
Vivid3D is a C++ IDE/3D engine, with python scripting.
PyCAPGE - Python Classic Adventure Point and Click Game Engine
Multidocument automation by templates - for sphinx, mkdocs, epydoc ...
C/C++ , PHP, PYTHON, 3D ENGINES, CHROME NATIVE CLIENT
Asphyre is a cross-platform framework for Delphi and FreePascal.
Event driven concurrent framework for Python
IRB is a game creation toolkit
The second demo of my game engine.
3D .NET engine for Windows, Linux, Mac
evolution for vegastrike SpaceSim/Combat/Trade game
AutoTeach makes kids study and learn in exchange for internet access.
Pygrid is an open-source and cross-platform pygame/python 2D engine.
A multiplatform game engine for interactive fiction experiences
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.