Summary and introduction for javascript game engines
http://www.designyourway.net/blog/resources/javascript-html5-game-engines-libraries-51-examples/
http://www.toolsjournal.com/integrations-articles/item/1633-10-popular-opensoure-html5-game-development-engines
http://www.toolsjournal.com/integrations-articles/item/1633-10-popular-opensoure-html5-game-development-engines
↓This site is not only for the javascript game engine, but also some game development SDK or toolkit.
Comparison:
benchmark on mobile os:
main different between CrafyJs, LimeJS, Impact
Several main engines just shine on mobile platform:
LimeJS
Collie
gogomakeplay
phaser
EntityJS