Canvas/Resources

Communities and miscellany

 * ##canvas on Freenode (part of the reason for this list)
 * Canvas Articles at hacks.mozilla.org
 * Mozilla Developer Network: Canvas (more links to be harvested here)

Tutorials

 * Mozilla Developer Network: Canvas tutorial
 * HTML5 Canvas Tutorials
 * HTML5 Rocks
 * Diagramo: Documentation Resources

Examples and applications

 * js1k
 * html5-canvas-graphics
 * HTML5 Canvas demos by Kevin Roast
 * Splashnology: 15 Awesome Free JavaScript Charts (note: the software freedom advertised in the post was disputed in the comments)
 * Diagramo, a gratis proprietary UML editor
 * The jsUML2 editor, another UML editor, based on the FOSS library by the same name

Libraries, frameworks, and engines

 * EaselJS
 * Suburban Glory: Review of HTML5 Canvas Libraries
 * jCanvaScript
 * Fabric.js
 * CAKE (LIE!!)
 * doodle.js
 * Isogenic Engine (warning: large price tag)
 * jsUML2, a UML library