- https://github.com/batiste/sprite.js - sprite animation framework
- http://renderengine.com/
- http://gamequery.onaluf.org/ - designed to be used with jQuery
- http://game.tyler-dewitt.com/ - tile based
- http://www.kesiev.com/akihabara/
- http://www.lukewallin.co.uk/?go=engine
- http://gogomakeplay.com/gmp
- http://craftyjs.com/
- http://www.effectgames.com/effect/
- http://www.propulsionjs.com/
- http://flax.ie/category/flax-game-engine/ - not released yet
- http://deanm.github.com/pre3d/ - Demo at http://www.chromeexperiments.com/detail/monster/
- https://github.com/mrdoob/three.js
- http://www.c3dl.org/
- http://www.ambiera.com/copperlicht/
- http://www.wxs.ca/js3d/
- http://www.flashsandy.org/ - Apparently compiles to JS via Haxe
- https://github.com/lostdecade/diggy - DHTML-based, abandoned
- http://impactjs.com/ - $99
- http://rocketpack.fi/engine/ - No idea of price, apparently they are testing the lib still
- http://www.wonderlandblog.com/wonderland/2010/04/aves-an-html-javascript-game-engine.html
- http://code.google.com/p/box2dweb/ - port of Box2D to JS
- http://guryjs.org/ - Canvas wrapper with a nice chain based interface
- http://raphaeljs.com/ - Raphaël, designed for drawing vector graphics
- http://labs.hyperandroid.com/animation - CAAT, animation toolkit
- https://github.com/meltingice/CamanJS - Basic filtering ops for Canvas
- https://github.com/millermedeiros/CanvasContext2DWrapper - Method chaining for Canvas
- https://github.com/eligrey/color.js - Color management utilities
- http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html - Fast implementation of blur for Canvas
- http://www.pixastic.com/ - Basic image manipulation ops
- http://sylvester.jcoglan.com/ - vector & matrix