Filed under Javascript
I am researching a way to implement a HTML 5 canvas application right now and so far these are Canvas libraries that look interesting (and still actively developed) to me.
This site, http://www.html5canvastutorials.com/, is also a good learning site to learn about the fundamental of HTML 5 canvas.
Cheatsheet for Canvas is here.
This paper.js tutorial on Smashing Magazine is awesome too.