I work with a lot of geographical based data, so naturally I have been playing with GIS (Geographical Information Systems).

I made this little sandbox from the Tiger 2010 US Census data, and an open source platform that I am working on expanding. Currently you can render the Country, state, county levels. I also have the ability to render water lines, zip codes, roads, addresses, etc. But, I have not uploaded these layers to my server due to the massive file size.

I made a small game that renders State and county lines, that you can check out here: http://gis.madmasterminds.com/