Voyeur.js
Voyeur is a tiny (1.2kb) Javascript library that lets you traverse and manipulate the DOM the way it should have been.
Vorlonjs
A new, open source, extensible, platform-agnostic tool for remotely debugging and testing your JavaScript. Powered by node.js and socket.io
Tablecloth
A CSS and JS bootstrap to style and manipulate data tables
Superscrollorama
The jQuery plugin for supercool scroll animations
Slit Slider
A responsive slideshow with a twist: the idea is to slice open the current slide when navigating to the next or previous one. Using jQuery and CSS animations we can create unique slide transitions for the content elements.
Motio
Small JavaScript library for sprite based animations and panning.
Jquerypp
jQuery's missing utils and special events
Google Closure Library
git-svn mirror of Google's Closure Library.
Es6 Shim
ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines
Contra
Asynchronous flow control with a functional taste to it
Codedoc
Create beautiful modern documentation websites.
Big Video.js
The jQuery Plugin for Big Background Video (and Images)
Backgrid
Finally, an easily stylable semantic HTML data grid widget with a Javascript API that doesn't suck.
Alloy Ui
Alloy is a UI metaframework that provides a consistent and simple API for building web applications across allthree levels of the browser: structure, style and behavior.
Webaudio.js
web audio library for games
Jquery Waypoints
Waypoints is a small jQuery plugin that makes it easy to execute a function whenever you scroll to an element.
AutoCompleteJS
AutoCompleteJS Widget