There was also GNO/ME - UNIX for the Apple IIgs - http://www.gno.org/gno/

They also had MkLinux. I have used it extensively as a workstation and Xterminal.

http://en.wikipedia.org/wiki/MkLinux

And Microsoft had Xenix before that!

I've used the SCO Xenix port of MS Word - way before the Windows version.

My first *nix was Microsoft Xenix on a TRS-80 / Tandy 6000. I think we had 6 terminals attached to it.

http://en.wikipedia.org/wiki/TRS-80#Model_16.2C_Model_16B.2C...

I remember seeing about 5 or 6 users on a Compaq 286 running Xenix accessing an application built around Informix. :-)