DXF files (short for Drawing eXchange Format), can be read into a wide range of applications including CAD programs such as AutoCAD.

The DXF file that BikeCAD Pro exports is only sparsely dimensioned. Here's a sample. Everyone seems to have different preferences in terms of what they'd like to see on a drawing. Therefore, it has been left clean so that you can mark it up as desired and/or plot it out at full scale using a generic CAD program.

There are several free CAD programs available on the net. For example, TurboCAD 2D, IntelliCAD Demo and CadStd.