I found this one by accident, but it’s more like DOSBox in that it runs 68000 executables with an emulated processor and emulated OS. Â No SHARP ROMs or HumanOS diskettes needed. Â It’s strictly text mode, but it’s enough to run executables produced by GCC.
The project is over on sourceforge, and unlike any other x68000 project this one is GPL’d. Â The source code is remarkably tiny so I’d say for anyone looking for a way to sneak some C into something this may be an interesting ‘door’..