Proton
A particle engine for html5
Comic.js
Cartoon style drawing for HTML5 Canvas & Raphael.js & D3.js & SVG.js
jQuery QR Code
qrcode generation standalone (doesn't depend on external services)
Graphicsjs
A lightweight JavaScript graphics library with the intuitive API, based on SVG/VML technology.
Drawingboard.js
A canvas based drawing app that you can integrate easily on your website.
Rimg
A responsive image solution for browsers that support mediaqueries. Pure javascript and no server-side code.
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
J Query.black and White
Clientside grayscale images on any browser
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.
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.
Chartist Js
Simple responsive charts
Breathing Halftone
Images go whoa with lots of floaty dots
Processing.js
A port of the Processing visualization language to JavaScript.
Isomer
Simple isometric graphics library for HTML5 canvas
Pixastic
JavaScript Image Processing Library
P5.js
A JS client-side library for creating graphic and interactive experiences, based on the core principles of Processing. http://twitter.com/p5xjs —
Color
JavaScript color conversion and manipulation library