RampCalc: Fun and useful flash-based tool gives you the layout and info for your mini ramp, using standard 4′ x 8′ sheets of plywood. More DIY skate and bike goodness!
Even if you’re not planning on building a ramp, this is a fun app to mess around with to see what you can fit on a sheet of wood.
For those of you into building ramps, check out my Ramp Plans Roundup.