Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
Js Barcode
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
Dagre
Directed graph renderer for javascript
Maker.js
📐⚙ Library for creating 2D vector drawings for CNC and laser cutter machines.
Pixastic
JavaScript Image Processing Library
Proton
A particle engine for html5
P2.js
JavaScript 2D physics library
Two.js
A renderer agnostic two-dimensional drawing api for the web.
Svgo
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
Color
JavaScript color conversion and manipulation library
Gif.js
JavaScript GIF encoding library
Canvg
Javascript SVG parser and renderer on Canvas
Image Mapster
jQuery plugin for enhancing HTML Image maps
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
Im.js
Image Match - Project to allow compare different images pixel by pixel with good performance
Breathing Halftone
Images go whoa with lots of floaty dots
Soc.js
An easier way to create social icons