They use the term «open source» incorrectly and provide design files that are a mix of open source licensed files along with other design files that are under a restrictive license.
OpenDesk.cc has also started restricting access to their design files so that they are only given out by request.
I have collected a list of their designs here, with notes indicating whether they fall under a free/libre license. A local copy of the free/libre design files are provided for convenience here.
