Kinetic Js
KineticJS is an HTML5 Canvas JavaScript library that extends the 2D context by enabling canvas interactivity for desktop and mobile applications.
Breathing Halftone
Images go whoa with lots of floaty dots
Vintage JS
vintageJS - add a retro/vintage effect to images using the HTML5 canvas element
Noisy
A jQuery plugin that adds random noise to the background of a given element.
Drawingboard.js
A canvas based drawing app that you can integrate easily on your website.
Soc.js
An easier way to create social icons
jCanvas
A jQuery plugin that makes the HTML5 canvas easy to work with.
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.
Im.js
Image Match - Project to allow compare different images pixel by pixel with good performance
Rimg
A responsive image solution for browsers that support mediaqueries. Pure javascript and no server-side code.
FloraJS
FloraJS is a JavaScript framework for simulating natural systems in a web browser.
Html2canvas
Screenshots with JavaScript
Isomer
Simple isometric graphics library for HTML5 canvas
Focal Point
A small set of CSS classnames to help keep images cropped on the focal point for responsive designs. Using only HTML/CSS, web authors can specify an image's focal point, which stays as the image's primary focus, while the image's available width changes on responsive webpages. Crop and re-size images depending on available width and let CSS to do all of the work, and without any JavaScript.
Joint
JavaScript diagramming library
Paper.js
The Swiss Army Knife of Vector Graphics Scripting – Scriptographer ported to JavaScript and the browser, using HTML5 Canvas. Created by @juerglehni & @jonathanpuckey
Raphael
JavaScript Vector Library