jCanvas
A jQuery plugin that makes the HTML5 canvas easy to work with.
Dagre
Directed graph renderer for javascript
Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
Paper.js
The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @juerglehni & @jonathanpuckey
Chartist Js
Simple responsive charts
Svgo
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
Liquidfun
2D physics engine for games
Js Barcode
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
Isomer
Simple isometric graphics library for HTML5 canvas
Proton
A particle engine for html5
Go Js
All GoJS samples, extensions, and documentation
Graphicsjs
A lightweight JavaScript graphics library with the intuitive API, based on SVG/VML technology.
Mapmap.js
A data-driven API for interactive thematic maps
Img to Ascii
A JavaScript implementation of a image to Ascii code
J Query.black and White
Clientside grayscale images on any browser
Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.
jQuery QR Code
qrcode generation standalone (doesn't depend on external services)