If you're getting into Game Development using HTML5 & JavaScript you might be looking for an IDE or Editor to speed up development and make your life a lot easier. I'll use this post to keep a list of the current HTML5/JS Game Development Editors.
- Impact - Has a great level editor and development tools. Well made.
- Crafty - Free! And doing much better than other free engines.
- Isogenic Engine - One of the most promising engines out there today. Massively multiplayer networking built in, uses Node.js and MongoDB, and has canvas or DOM-based graphics.
- Construct 2 - One of the first WebGL enabled HTML5 game engines. Exports purely to HTML5 and Javascript. Uses Canvas only and is extendable with Javascript plugins.
- Rocket Engine - Purchased by Disney. Not available.