What is the weirdest Hardware you have used as a workstation

There was a development machine for an embedded system that had dual 8085 (!) processors. With those processors, you'd guess that it didn't do a GUI, and you'd be right. It didn't even multitask between processors in the conventional sense. But there was a key that would toggle which was the active processor, and it would take over the display and IO.

An awful SCO Unix server that was pressed into service as a workstation to maintain a contract on life support.