P2.js
JavaScript 2D physics library
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
Bonsai
BonsaiJS is a graphics library and renderer
Breathing Halftone
Images go whoa with lots of floaty dots
Raphael
JavaScript Vector Library
Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.
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.
Svgo
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
Croppie
A Javascript Image Cropper
Clmtrackr
Javascript library for precise tracking of facial features via Constrained Local Models
Snap.svg
The JavaScript library for modern SVG graphics.
FloraJS
FloraJS is a JavaScript framework for simulating natural systems in a web browser.
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.
Jcrop
Jcrop (official) - Image Cropping Plugin for jQuery
Processing.js
A port of the Processing visualization language to JavaScript.
Cropper
A simple jQuery image cropping plugin.
Img to Ascii
A JavaScript implementation of a image to Ascii code