3D .NET engine for Windows, Linux, Mac
Lightweight framework for old-school RPG GUI in web!
A Flash Molehill (Stage3D) GPU accelerated 2D game engine
Make robots for MediaWiki-powered sites!
upload binaries to Vectrex game console
DragonBones TypeScript / JavaScript Runtime
DragonBones DesignPanel
Create units and attacks for Wesnoth!
2D game creation software
Cross-platform C framework very compact libraries and tools.
PSP Debug Bash and Multi-Environment Shell
Arengu is a free 2D RPG with a thrilling story and exciting gameplay.
C++ Framework for slot machine games
MicroLua brings Lua on the Nintendo DS for easy programming
Pygrid is an open-source and cross-platform pygame/python 2D engine.
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+