:iphone: Collaborative List of Open-Source iOS Apps
Desktop/Android/HTML5/iOS Java game development framework
Free (as in freedom) open source clone of the Age of Empires II engine :rocket:
CSS is powerful, you can do a lot of things without JS.
The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.
:video_game: A list of popular/awesome video games, add-ons, maps, etc. hosted on GitHub. Any genre. Any platform. Any engine.
💿 Free software that works great, and also happens to be open-source Python.