Pls don't include subjective thoughts, or moderators will close this question like they closed our last one (http://stackoverflow.com/questions/7668076/impact-vs-other-javascript-game-engines).
We need game engines that can run on iOS devices and ideally Android devices as well.
Thanks!
Here's a site which contains a big list of JS game engines:
http://www.reddit.com/r/javascript/comments/f094j/list_of_js_game_engines_community_effort/
Also, if you're interested in this sort of thing, you might want to subscribe to the Javascript Weekly newsletter (or at least read the back-issues from their site). This newsletter is a great way of keeping up-to-date with the latest news in the Javascript world, including news about new JS libraries that come out. Game libraries have features quite often.
Hope that helps.
Crafty javascript game engine also exists.
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