Rondell is a jQuery plugin for displaying galeries and other content the way you want.  

jQuery Upvote is a plugin that generates a voting widget like the one used on Stack Exchange sites.  

Flickerplate is a cool jQuery plugin that lets you flick through content. It's simple to use, fully responsive and touch enabled

jQuery Open Carousel is an open and easy to implement carousel display made using jQuery. It supports linking to scroll

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser. This library makes it easy for you to write

Portamento.js is a jQuery plugin that makes it simple to add sliding (aka "floating") panel functionality to your web page. All that's

scroll2Top is a simple customizable jQuery plugin for scrolling back to top of page.   

Foggy is a jQuery plugin for blurring page elements. It supports IE (8 and up), Firefox, Safari and Chrome.  

jScroll is a jQuery plugin for infinite scrolling; also known as lazy loading, endless scrolling, autopager, endless pages, etc.; is the ability to

Flux slider is a CSS3 animation based image transition framework.   Instead of the traditional Javascript timer based