[NikkiA]

Also PCem, which is has a faster dynamic recompiler and supports a few more hardware configs afaik. But hasn't been updated in a couple of years.

There's also UniPCem, which I think is a fork/port of PCem, and more recently updated. But I haven't tried it.

[LeoPanthera]

86box is itself a fork of PCem.

[mrlonglong]

I use that myself to rekindle my love affair with the Amstrad PC1512, with some enhancements, 128KB ram expansion, and a pair of 32MB hard disks.