Other JavaScript Engines. Listed in the Render Engine wiki.
The Reality of HTML5 Game Development and making money from it
Building a JavaScript-Based Game Engine for the Web - Google Tech Talk
HTML5 for Game Developers. Video session that introduce game developers to the web programming model.
Monkey - Programming language that targets many languages including JS. Demo version is free for non-commercial usage.
Simple canvas game tutorial - Doodle jump on canvas in 6KB of code by Michal Budzynski.
Pixie - HTML5 based pixel editor. Demo Editor's note: This might have to go to an "applications" page.
HTML5 Game Development - Portal focused on HTML5 game development.
playtomic - Commercial service providing analytics, leaderboards etc. services for games. Provides HTML5/JS API in addition to AS2/AS3 ones.
PlayMyCode - Online game creation community. Uses Quby (looks like Ruby) and compiles to JavaScript.
Sphere RPG Engine - Designed for RPG creation. Uses JavaScript to script logic.
Game engines feature comparison - Comparison of the features of some javascript game engines, by the creators of Isogenic Engine.