d3.js is a popular JavaScript data visualisation library. The main difference from other charting library is its focus on interactivity. Makoto created a series of screencast called “The Joy of d3.js”, a commit-by-commit guide to building Hans Rosling’s “GapMinder” data visualisation in d3.js. The more detail is at http://blog.new-bamboo.co.uk/2013/01/07/the-joy-of-d3-js
Questions answered :
How to use d3.js


