Jonathan Manton has written an Inkscape extension that, among other things, makes it easier to create polyhedra out of heavy paper that has been cut/scored using the Epilog Laser.
I've developed an Inkscape extension to render the polyhedra nets I've been making the last few months. It can make nets for the platonic, archimedean, and archimedean dual solids. There are several options for tabs including tab and slot, no tabs (for showing rather that assembling), and a couple of options for tabs that can be glued.
The full writeup is here: