What >> published << Blackmoor clones are out there?

[aldarron]

Blackmarsh, but also I would consider Greyhawk Blackmoor to be a Blackmoor knock-off. It clearly borrows ideas from the "real" Blackmoor. Maybe it being a mirror world would be a better description.

There's also various Frog Cult adventures that seem like Blackmoor in all but name. Fane of the Toad is one that comes to mind, IIRC.