Great news for HTML5 game developers: a few days ago Superpowers was released under the ISC license.
What is Superpowers? A game development platform (an integrated editor but you can collaborate in realtime online; how cool is that! :D ) for making HTML5 games using TypeScript (a superset of Javascript). But you will also be able to work with other languages, so far support for the well known L�VE2D is available.
Learn more in this video:
The source is available here and there is also an repository with a few sample games. If you like what they are doing, please consider becoming a supporter.
Looking forward to your new HTML5 games!