Extensible HTML5 app for real-time collaborative projects
486 lines of C++: old-school FPS in a weekend
A minimalist and cross platform System Shock source port
Build Cross-platform Applications
MMORPG
scriptable game engine with built-in support for 2D graphics and sound
3D .NET engine for Windows, Linux, Mac
A game engine written in the D programming language
A Flash Molehill (Stage3D) GPU accelerated 2D game engine
a very lightweight advanced terrain-rendering and 3D map rendering sys
Plugin based multi-purpose dev tool.
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
Graph editing tool
C-Lesh is a game programming language for 2D games.
Access to Irrlicht Engine SDK from assembler, C, Python, Basic, Pascal
Cross-platform reimplementation of AMOS BASIC (runtime)
Multi-Language Wrapper Collection for the Irrlicht Engine
AMOS BASIC reimplementation in Java
fiftyfifty is a programming language and game