Google Chart API 
Posted on December 07, 2007
Dynamically generate charts
http://code.google.com/apis/chart
The Google Chart API is an extremely simple tool that lets you easily create a chart from some data and embed it in a web page. You embed the data and formatting parameters in an HTTP request, and Google returns a PNG image of the chart. Many types of chart are supported, and by making the request into an image tag you can simply include the chart in a web page.
