SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
Simple responsive charts
A lightweight library for manipulating and animating SVG
A simple jQuery image cropping plugin.
A renderer agnostic two-dimensional drawing api for the web.
2D physics engine for games
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
Jcrop (official) - Image Cropping Plugin for jQuery