CTFs as you need them
Self-hosted CMS platform based on the Laravel PHP Framework
A cross platform Lua based game engine
Asphyre is a cross-platform framework for Delphi and FreePascal.
a game library to develop audio games
Multi-threaded 2D Renderer licensed under the Mozilla Public License
C++ Framework for slot machine games
Scriptable frontend for media applications.
Pear3DEngine is a modern and modular 3D development framework
DiaT is a Textadventure