Scrob Master
Master your scroll events.
Masonry
Layout elements in a grid, like a mason fitting stones in a wall
Sizzle
A sizzlin' hot selector engine.
Bind.js
bind.js - simple two way data binding to HTML and callbacks
Rye
A modern, lightweight browser library using ES5 natives
Jquery Sieve
Sieve is a jQuery plugin allows you to quickly add an interactive search filter to any block of content.
Bespoke.js
DIY Presentation Micro-Framework
jScrollPane
Pretty, customisable, cross browser replacement scrollbars
Tapestry5 jQuery
Tapestry 5 jQuery integration. Fully replace Prototype and Scriptaculous with jQuery with as less as possible compatibility issues
Veinjs
Injects CSS into the document (it's a perfectly legal procedure)
Gliojs
Exit popup easely. Detects if the mouse of a user leaves the viewport borders of your website
Zepto
Zepto.js is a minimalist JavaScript library for modern browsers, with a jQuery-compatible API
Phantomjs
Scriptable Headless WebKit
Wow
Reveal CSS animation as you scroll down a page
Design Blocks
A set of 170+ Bootstrap based design blocks ready to be used to create clean modern websites.
Viewport
Gets the dimensions of the Viewport and beyond.
Cyclejs
A functional and reactive JavaScript framework for predictable code