None are very good as far as commerical quality go, but if you are interested here is a simple selection.
Xenon Tribute
A tribute to the old Xenon games by the
Bitmap Brothers. In fact it uses their
graphics from the Xenon 2000 project.
Galaxy
A Masters of Orion clone.
BTC
A clone of the classic Bards Tale.
MUD
A modified version of SmaugFUSS.
Please note: None of these games are complete, and in fact it is unlikely that they ever will be.