d3.js

Here is a short video

D3 Show Reel from Mike Bostock on Vimeo.

Here is a longer tutorial video

Data-driven Documents from London Web Standards on Vimeo.

You can go through the actual presentation slides at http://lws.node3.org/#landing-slide

NOTE: these”slides” are active pages. You can click on the pages and interact with them.

They are in live d3. Try this page for example and click on one of the  points in the graph

http://lws.node3.org/#transitions-2

This page is a fun one: http://lws.node3.org/#demo-3 Drag your mouse around the page – it eventually draws a picture