I started off making a plain Stainless Steel cufflink. Modelled in OpenSCAD
. To get the hang of using 3d Printing services online. They look fantastic - so I started development of an electronic version.
OpenSCAD is wonderful, but even better - which I have now used for the latest prototypes is SolidPython
. It allows python to generate the OpenSCAD file, which than can be used to generate the 3d "STL" file than can be sent off for printing (Shapeways, i.materialise, or Sculpteo)