jCanvas
A jQuery plugin that makes the HTML5 canvas easy to work with.
Dagre
Directed graph renderer for javascript
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.
Go Js
All GoJS samples, extensions, and documentation
Maker.js
📐⚙ Library for creating 2D vector drawings for CNC and laser cutter machines.
Isomer
Simple isometric graphics library for HTML5 canvas
Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.
Mapmap.js
A data-driven API for interactive thematic maps
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
Img to Ascii
A JavaScript implementation of a image to Ascii code
J Query.black and White
Clientside grayscale images on any browser
Breathing Halftone
Images go whoa with lots of floaty dots
Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
W Paint
jQuery Paint Plugin