Google new chart API
A new API from Google that generates information charts in a dynamic way. its usage is quite straightforward: you link to an image in the form of a parameterized URL, such as http://chart.apis.google.com/chart?cht=p3&chd=t:90,49&chs=400×200&chl=data|bling.
“chd=t:90,49? are the chart values, text-encoded, and separated by a comma.
“chs=400×200? is the custom chart size, 400 by 200 pixels.
“chl=Data|Bling” are the different labels for the pie chart sections, separated via the pipe character.
chart types include: line charts, bar charts, pie charts, Venn diagrams & scatterplots.