Doom / Heretic map loading system for GameMaker
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
A quick and easy to use drag and drop retro game creator for your favourite handheld video game system
Twine, a tool for telling interactive, nonlinear stories
HARFANG 3D source code public repository
Emulator that lets you play NES games in 3D. [Website]