A geographic map that displays GitHub commits by countries. To view the map and information on how it was created see this article.
You can also view this gist at bl.ocks.org. If you fork it and apply changes you can see them live at bl.ocks.org/YOUR_GIST_ID
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Modified http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js to a secure url
https://www.google.com/jsapi
https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js