Ember.js : A JavaScript framework for creating ambitious web applications
Band.js : An interface for the Web Audio API that supports rhythms, multiple instruments, repeating sections, and complex time signatures.
polyfill : polyfill makes web development less frustrating by selectively polyfilling just what the browser needs. Use it on your own site, or as a service.
Push by Nickersoft : A compact, cross-browser solution for using the JavaScript Notifications API
stream.js : stream.js is a tiny stand-alone Javascript library that unlocks a new data structure for you: streams.
A super micro tiny DOM library for authoring HTML5 mobile web applications.