Benchmark.js
A benchmarking library that works on nearly all JavaScript platforms, supports high-resolution timers, and returns statistically significant results. As used on jsPerf.com.
Backbone Layout Manager
A layout and template manager for Backbone.js applications.
Frame Player
A video player without video files, just JSON. Based on 'images frames' thought to mobile devices!
Flipload
Flipping elements and show a loading indicator easily.
Mesh.js
common, streamable interface for synchronizing data
jQuery Timepicker
Adds a timepicker to jQueryUI Datepicker
Sammy
Sammy is a tiny javascript framework built on top of jQuery, It's RESTful Evented Javascript.
Prettydiff
Compare code instead of text.
Normalize.css
A modern, HTML5-ready alternative to CSS resets (as used by Twitter Bootstrap, HTML5 Boilerplate, TweetDeck, Soundcloud, and many others).
Flex Slider
An awesome, fully responsive jQuery slider plugin
Animsition
A simple and easy jQuery plugin for CSS animated page transitions.
Remark
A simple, in-browser, markdown-driven slideshow tool.
Mustache.js
Minimal templating with {{mustaches}} in JavaScript
Lodash
An alternative to Underscore.js, delivering consistency, customization, performance, and extra features.
Loaders.css
Delightful, performance-focused pure css loading animations.
Famous
Famo.us is a powerful JavaScript framework designed to build rich, interactive web applications. It is the only framework that provides an open source 3D layout engine fully integrated with a 3D physics-based animation engine that can render to DOM, Canvas, or WebGL. Famo.us is currently in public beta.
Data Tables
DataTables is a plug-in for the jQuery Javascript library. It is a highly flexible tool, based upon the foundations of progressive enhancement, which will add advanced interaction controls to any HTML table.