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HTML5 Game Engines
ImpactJS
Cost: 99$
Melonjs
Cost: Free
Akihabara
Cost: Free
http://www.kesiev.com/akihabara/
Construct 2
Cost: Free / 79$ / 365$ depending on options
http://www.scirra.com/construct2
Cocos2D-HTML
Cost: Free
http://www.cocos2d-x.org/projects/cocos2d-x/wiki/Html5
Cocos2D Javascript
Cost: Free
https://github.com/RyanWilliams/cocos2d-javascript
Crafty
Cost: Free
GameQuery
Cost: Free
IsoGenic
Cost: 0$ / 64 GBP / 164 GBP
jsGameSoup
Cost: Free
http://www.jsgamesoup.net (link no longer available)
Pulse Engine
Cost: Free
Experimental / In Development Engines:
Canvex
Cost: Free
http://canvex.lazyilluminati.com/
jGen
Cost: Free
http://code.google.com/p/jgen/
Other possibly abandoned game engines:
FlixelJS
Cost: Free
https://github.com/BillyWM/FlixelJS
GameJS
Cost: Free
GammaJS
Cost: Free
Cross compile to HTML 5
PlayN
Cost: Free
http://code.google.com/p/playn/
ProcessingJS
Cost: Free
HaXe
Cost: Free
libGDX
Cost: Free
http://code.google.com/p/libgdx/
Mobile HTML5/JavaScript Libraries/Engines
PhoneGap
Cost: Free?
Appcelerator Titanium
Cost: Free / ???
Rim WebWorks
Cost: Free
https://developer.blackberry.com/html5/
Other game development related libraries
SpriteJS
Cost: Free
https://github.com/batiste/sprite.js
SoundManager2
Cost: Free
http://www.schillmania.com/projects/soundmanager2/
CAKE
Cost: Free
http://code.google.com/p/cakejs/
Easel
Cost: Free?
http://www.createjs.com/#1/EaselJS
TweenJS
Cost: Free
http://www.createjs.com/#!/TweenJS
SoundJS
Cost:Free
http://www.createjs.com/#!/SoundJS
directCanvas
Cost: Free
http://www.appmobi.com/index.php?q=content/directcanvas-accelerates-html5-game-performance
box2d-JS
Cost: Free
http://box2d-js.sourceforge.net/
Buzz! HTML5 audio library
Cost: Free
Three.js
Cost: Free
https://github.com/mrdoob/three.js/
Raphael Vector Library
Cost: Free
Clay.io
Cost: 20% of processed amount
JavaScript compilers (Extension languages that compile to JavaScript)
Coffeescript
Cost: Free
Closure
Cost: Free
http://developers.google.com/closure/
Dart
Cost: Free
http://code.google.com/p/dart/
Books
JavaScript specific
JavaScript: The Definitive Guide
JavaScript/HTML5 Game related
Making Isometric Social Real-Time Games with HTML5, CSS3 and Javascript
Learning HTML5 Game Programming
HTML5 Game Development by Example
Foundation HTML5 Canvas: For Games and Entertainment
Other libraries of note
Modernizr
Cost: Free
jQuery
Cost:Free
jQueryUI
Cost: Free
jQueryMobile
Cost: Free
YUI
Cost: Free
Backbone.JS
Cost: Free
Icanhaz.js
Cost: Free
Node
Cost: Free
Underscore
Cost: Free
{{ Mustache JS }}
Cost: Free
https://github.com/janl/mustache.js
IDEs and Tools
Jetbrains WebStorm
Cost: 49$ +, 30 day trial
http://www.jetbrains.com/webstorm/index.html
Sublime Text
Cost: 49$
Aptana
Cost: Free
Notepad++ (just an editor, but a very good one )
Cost: Free
Ripple mobile device emulator
Cost: Free
Cloud 9 Web Based IDE
Cost: Free
appMobi XDK ( Include ImpactJS )
Cost: 99$ a year
http://xdk.appmobi.com/ (link no longer available)
jsFiddle
Cost: Free
Fiddler web debugger
Cost: Free
http://www.fiddler2.com/fiddler2/
JSLint
Cost: Free
Key Websites
http://www.khronos.org/webgl/ – WebGL, OpenGL for the browsers
https://developer.mozilla.org/en/WebSockets – WebSockets, networking in the browser
http://hacks.mozilla.org/2012/03/browserquest/ – An MMO in JavaScript + HTML5
http://msdn.microsoft.com/en-us/library/6974wx4d(v=VS.94).aspx – Java Script fundamentals