Raphaël : Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or...
Bliss.js : Want to use Vanilla JS but find native APIs a bit unwieldy? Bliss is for you
xui.js : A super micro tiny DOM library for authoring HTML5 mobile web applications.
loglevel : Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Prototype : Easy Ajax and DOM manipulation for dynamic web applications
A simple library for handling keyboard shortcuts in Javascript.