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.
Svg.js
A lightweight library for manipulating and animating SVG
Bonsai
BonsaiJS is a graphics library and renderer
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
jQuery Focuspoint
jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.
Canvg
Javascript SVG parser and renderer on Canvas
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Raphael
JavaScript Vector Library
Croppie
A Javascript Image Cropper
Processing.js
A port of the Processing visualization language to JavaScript.
Konva
Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
Snap.svg
The JavaScript library for modern SVG graphics.
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
P2.js
JavaScript 2D physics library
Graphicsjs
A lightweight JavaScript graphics library with the intuitive API, based on SVG/VML technology.
Proton
A particle engine for html5
Obelisk.js
JavaScript Engine for Building Isometric Pixel Element with HTML5 Canvas