A light-weight, customizable lightbox plugin for jQuery
2D physics engine for games
Backstretch is a simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any page or element. The image will stretch to fit the page/element, and will automatically resize as the window/element size changes.
Jcrop (official) - Image Cropping Plugin for jQuery
qrcode generation standalone (doesn't depend on external services)
A workshopper for GLSL shaders and graphics programming
A WebGL graphic library for building scalable Web3D applications