two.js
A renderer agnostic two-dimensional drawing api for the web.
canvas-sketch
A utility for quickly prototyping 2D and WebGL sketches
canvas-designer
Collaborative, extendable, JavaScript Canvas2D drawing tool, supporting dozens of builtin tools, as well as generates JavaScript code for 2D animations.
node-canvas-text
Using a provided Opentype.js font object, draws a string, sized to fit inside a given rectangle on an HTML5 canvas