Coqplay is a project mainly written in Verilog, it's free.
This is a repository where I've decided to put my random Coq developents rather than quitting coqide without saving. I do some interesting stuff... maybe not according to a guru, but to me, and I figure I'd like to keep it around.
Someday I want to (help) make a really good theorem search engine, so it would be nice to have a bunch of random unsorted theorems around for that project too :-)