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Getting Started With Charts - Google Chart Tools / Image Charts (aka Chart API) - Google Code
There's no limit to the number of calls per day you can make to the Google Chart API. However, we reserve the right to block any use that we regard as abusive. The quickest way to make a chart for your web page is to use our new chart wizard .
Two years ago, Google acquired Gapminder , the Swedish graphics-display company whose Trendalyzer software specializes in representing data over time .
Dataviz, democratized: Google opens Public Data Explorer » Nieman Journalism Lab » Pushing to the Future of Journalism