mmlinks

d3.js ~ Force-Directed Graph
http://mbostock.github.com/d3/ex/force.html

deck.js ~ Create presentations in HTML
http://imakewebthings.github.com/deck.js/introduction/#digging-deeper

three.js ~ WebGL
http://alteredqualia.com/three/examples/webgl_cars.html

tangle.js ~ Tangle is a JavaScript library for creating reactive documents
http://worrydream.com/Tangle/

recurly.js ~ Secure, PCI Compliant Transaction Forms With Fully Customizable CSS.
http://js.recurly.com/

pdf.js: Rendering PDF with HTML5 and JavaScript | Andreas Gal
http://andreasgal.com/2011/06/15/pdf-js/