Это старая версия документа!
http://diveintohtml5.info/canvas.html – (уголки)
https://github.com/jamiegilmartin/CanvasScratchOff
http://beej.us/blog/data/html5-canvas-globalcompositeoperation/
http://jsfiddle.net/elin/5dbTJ/light/
http://ace.c9.io/build/kitchen-sink.html
https://github.com/ajaxorg/ace
https://developer.mozilla.org/en-US/docs/HTML/Canvas/Drawing_Graphics_with_Canvas
http://codetheory.in/creating-a-paint-application-with-html5-canvas/
http://billmill.org/static/canvastutorial/finish.html
http://dev.opera.com/articles/view/html-5-canvas-the-basics/
http://dev.opera.com/articles/view/html5-canvas-painting/
http://www.sitepoint.com/html5-canvas-tutorial-introduction/
https://github.com/rwaldron/burst-core
http://www.html5rocks.com/en/tutorials/raphael/intro/
http://www.createjs.com/#!/EaselJS/demos/apitest