Baraja is a jQuery plugin that allows to move elements in a card-like fashion and spread them like one would spread a deck of cards on a table.
A jQuery plugin that makes the HTML5 canvas easy to work with.
Responsive jQuery content slider
A lightweight CSS3 image gallery that is pretty to look and and easy to use
A jQuery image slider plugin written specifically for responsive web design.
Jcrop (official) - Image Cropping Plugin for jQuery
The Most Awesome jQuery Image Slider
jQuery image slider plugin for creating 360 degree product tours
jQuery Paint Plugin
MathBox is a (work in progress) library for making presentation-quality math diagrams in WebGL.