Impact HTML5 Game Engine released
The grand list of similar (free) projects:http://easeljs.com/https://github.com/biilly/doodle-jshttps://github.com/fairfieldt/xcjshttps://github.com/batiste/sprite.jshttps://github.com/mrdoob/three.jshttps://github.com/ysimonson/canvas.jshttps://github.com/davebalmer/johttps://github.com/lostdecade/diggyhttp://gamejs.org/http://www.aframejs.com/http://gamequery.onaluf.org/http://www.kesiev.com/akihabara/