
Another good idea by google! A very simple chart API. There is no posts, no complicated code. You just access a url, pass the correct parameters and voila. Your chart is ready.
e.g. the url http://chart.apis.google.com/chart?cht=p3&chd=s:hW&chs=250×100&chl=Hello|World
Will return this image:
According to Steve Crossan, of the google API team, this is one of those technologies developed has a “20% time project” and is already used in applications such has Google Video and Google Finance.
Here are some useful resources: