jCanvas
A jQuery plugin that makes the HTML5 canvas easy to work with.
Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
Maker.js
📐⚙ Library for creating 2D vector drawings for CNC and laser cutter machines.
Dagre
Directed graph renderer for javascript
Js Barcode
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
Obelisk.js
JavaScript Engine for Building Isometric Pixel Element with HTML5 Canvas
Go Js
All GoJS samples, extensions, and documentation
Gif.js
JavaScript GIF encoding library
Scene Graph.js
HTML5 Canvas and Animation Framework
Raphael
JavaScript Vector Library
Liquidfun
2D physics engine for games
Html2canvas
Screenshots with JavaScript
Noisy
A jQuery plugin that adds random noise to the background of a given element.
P2.js
JavaScript 2D physics library
Easel JS
The Easel Javascript library provides a full, hierarchical display list, a core interaction model, and helper classes to make working with the HTML5 Canvas element much easier.
Snap.svg
The JavaScript library for modern SVG graphics.
Vintage JS
vintageJS - add a retro/vintage effect to images using the HTML5 canvas element