Sproutcore
JavaScript Application Framework - JS library only
Retina.js
JavaScript and LESS helpers for rendering high-resolution image variants
Plottable
A library of modular chart components, built on D3
Pixel Craft
A Pixel Art Editor
Parsimmon
A monadic LL(infinity) parser combinator library for javascript
Noisy
A jQuery plugin that adds random noise to the background of a given element.
Metismenu
A jQuery menu plugin
Jquerypp
jQuery's missing utils and special events
J Query Selectric
jQuery plugin for easy manipulation and customization of HTML selects
Isometric
JSIso - An HTML5 Canvas Tile Engine
Dna.js
An uncomplicated user interface library for semantic templates
Atom
Atom javascript framewok
Animatescroll.js
A Simple jQuery Plugin for Animating Scroll
Modules Webmake
Bundle CommonJS/Node.js modules for web browser
Buzz
Buzz is a small but powerful Javascript library that allows you to easily take advantage of the new HTML5 audio element. It tries to degrade gracefully on non-modern browsers.
jVectorMap
Show interactive vector maps on the web.
Trip.js
Trip.js is a plugin that can help you customize a tutorial trip easily with more flexibilities. ( Based on jQuery )