Mey and I are considering several software alternatives that allow us to make the prototypes and send them to be 3D printed.
The ideal would be that we could use the same software on our different platforms. Mey is using OSX and I’m using Ubuntu GNU/Linux.
So far my favorite choice is FreeCAD, for several reasons. One, of course, is because it is free, with no restrictions or paid extra features. Another one is because I got used to SolidWorks at the University, and FreeCAD learning curve is less steep for me than, for example, OpenSCAD.