Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
Html2canvas
Screenshots with JavaScript
Svgo
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
Chartist Js
Simple responsive charts
Paper.js
The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @juerglehni & @jonathanpuckey
Svg.js
A lightweight library for manipulating and animating SVG
Raphael
JavaScript Vector 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.
Cropper
A simple jQuery image cropping plugin.
Two.js
A renderer agnostic two-dimensional drawing api for the web.
Konva
Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Go Js
All GoJS samples, extensions, and documentation
Js Barcode
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
Liquidfun
2D physics engine for games
Croppie
A Javascript Image Cropper