INSTEAD - Simple Text Adventure Interpreter.
A free 3D game engine to create games and realtimes scenes for Windows
2D Game Engine
A cross platform Lua based game engine
Cross-platform 2D and 3D game engine
IRB is a game creation toolkit
2D ARPG Engine
Single-/multi-player card game Mau Mau (similar to UNO®)
c# lua bind with unity3d project for game development
Pear3DEngine is a modern and modular 3D development framework
Make games with Lego-like building blocks