jQuery.fluxoModal is a jQuery plug-in similar to lightbox. It can highlight any kind of html element inside an html modal window, blurring the background using html5 canvas, CSS3 animations and a crossbrowser fallback for IE.
jquery.transform.js adds 2D transform capabilities to jQuery css() and animate() functions.
BookBlock is a jQuery plugin that can be used for creating booklet-like components that allow a "page flip" navigation. Any content can be used, such as images or text. The plugin transforms the structure only when needed (i.e. when flipping a page) and uses some overlays as shadow for the pages to create more realism.
Spritespin is a jQuery plugin that enables sprite animation in your website. It takes an array of images or a stiched sprite sheet and is able to play these images frame by frame. This results in an animation.
JZoopraxiscope is a jQuery plugin for making animations from static images inspired in Eadweard Muybridge's Zoopraxiscope.
jTPS is a datatable jQuery plugin that offers pagination, animated scrolling through pages and intelligent natural sorting capability. The development version is currently 15KB.
Skitter is a jQuery plugin that enables us to convert unordered lists into slideshows with attractive animations. The slideshow can display the list of slides as numbers or thumbnails and items can be browsed with the help of prev-next buttons as well.
An alert alternative for jQuery that looks good. Apprise is a very simple, fast, attractive, and unobtrusive way to communicate with your users. Also, this gives you complete control over style, content, position, and functionality.