Sometime around the year 2000, I created a Java applet called FullSuspensionCAD. Unfortunately, I have not updated that program in all this time. You can still see it and use it in the original form at: http://www.bikeforest.com/CAD/fsCAD.html

I do hope to integrate rear suspension into BikeCAD at some point. However, I plan to add tandem functionality to BikeCAD as well and I think that I'll be adding the tandem option first. Like FullSuspensionCAD, TandemCAD is still available at: http://www.bikeforest.com/CAD/tandemCAD.html . However, it too has not been updated since 2000.