Cadkey was bought out by Kubotek of Japan but is still developed in Massachusetts and is now called KeyCreator. You can set it up to look just like the old Cadkey (even with the F keys if you want) but itís a much, much better program now.
You can download a free 30 day trial here:
Kubotek USA 3D CAD Software, 3D Model Validation, CAD Model Viewing
Iíve been using Cadkey, now KeyCreator since the 80ís. Great program. I used Solid Edge for a few years, a good program but not as fast a KeyCreator. KeyCreator is on the verge of releasing a 64 bit version, canít wait.