Paper Pilot

Paper Pilot cute little website that lets you design and test paper airplanes.  Design  your plane by using some standard models as starting points and then adjust the parameters to your liking.  Test your airplane's performance on the practice field and then make any needed design adjustments.  When you plane has been perfected, bring it to the challenge stadium to compete.  Paper Pilot is a promotional site for SolidWorks DWGgateway (a converter to import AutoCAD files into Solidworks).  I'm not entirely sure on what the connection between the two is, but who cares it's a fun idea.