A JS client-side library for creating graphic and interactive experiences, based on the core principles of Processing. http://twitter.com/p5xjs —
Simple responsive charts
SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
A lightweight library for manipulating and animating SVG
A renderer agnostic two-dimensional drawing api for the web.
2D physics engine for games
Jcrop (official) - Image Cropping Plugin for jQuery
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode