qrcode generation standalone (doesn't depend on external services)
A lightweight library for manipulating and animating SVG
A simple jQuery image cropping plugin.
Simple isometric graphics library for HTML5 canvas
HTML5 Canvas and Animation Framework
jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.
A jQuery plugin that adds random noise to the background of a given element.
Clientside grayscale images on any browser
2D physics engine for games