Reliable / Popular data visualization toolkit for the web

Question

Hi,

I'm looking for a reliable toolkit in any web-neutral[A] language, actively maintained / developed, stable that allows me to build graphs, charts, display data dynamically, allow drag-n-drop of datasets and refreshes automatically.

Carlos Scheidegger recommended - http://vis.stanford.edu/protovis/ which looks great! But I'm looking to see what others are there and what ppl are using...

[A] What I mean is something like js / jquery, etc. which can be generated by any web language like php, python, perl, etc

Answer 1

Check out the MIT Smile project, RGraph, and of course Processing (if you are willing to deal with applets).

Answer 2

Raphael is also a good option.

Answer 3

You might want to check out Google Analytics, Yahoo Web Analytics, Omniture SiteCatalyst, or Webtrends.