In 2009 I created an extension to the folding library which included the other platonic solids, an alternative representation of the dodecahedron (which was requested on the forum) and some archimedean solids. This patch contains the changes I made at that time.
TikZ folding library: other platonic solids, alternative dodecahedron and some archimedean solids
Added in CVS, including a tiny bit of documentation.