GrabCAD is an amazing resource for FIRST teams to use. Ever since they started sponsoring FIRST last year I've used the resource for Ri3D (
SnowProblem), FTC #5943 and FRC #2470. It is a great way to do CAD version control and look at your designs from literally any internet connect device. It is pretty cool when a judge walks up to your pit and you can pull out your tablet/cell phone with the GrabCAD app and have them play with your design.
Disclaimer: I work for Stratasys, which owns GrabCAD.