Audio.js
A cross-browser javascript wrapper for the html5 audio tag
Video.js
Universal video embed.
Caat
Canvas Advanced Animation Toolkit
Rekapi
A keyframe animation library for JavaScript.
Fabric.js
Javascript Canvas Library, SVG-to-Canvas (and canvas-to-SVG) Parser
Chaplin
An Application Architecture Using Backbone.js
Pep
Pep, a lightweight jQuery plugin for kinetic drag on mobile/desktop
Abaaso
A modern, lightweight enterprise-class RESTful JavaScript application framework.
Nivo Slider
The Most Awesome jQuery Image Slider
Audio5js
The HTML5 Audio Compatibility Layer
ZenPen
A minimal web based text editor for the modern man.
Xdate
A Modern JavaScript Date Library
Anima
CSS animations with a soul
Peerjs
Peer-to-peer data in the browser
Tempo
Tempo is an easy, intuitive JavaScript rendering engine that enables you to craft data templates in pure HTML.
Balance Text
A jQuery plugin for implementing balancing of wrapping text in a web page
QuoJs
Micro JavaScript library for mobile devices