2D physics engine for games
Jcrop (official) - Image Cropping Plugin for jQuery
Barcode generation library that works in both the browser and on Node.js http://lindell.me/JsBarcode
jQuery plugin for 'responsive cropping'. Dynamically crop images to fill available space without cutting out the image's subject. Great for full-screen images.
HTML5 Canvas and Animation Framework
A data-driven API for interactive thematic maps
A JS client-side library for creating graphic and interactive experiences, based on the core principles of Processing. http://twitter.com/p5xjs —