Runaway Mine Train at M&D's was an obscure spinning coaster with a spiral lift hill made by Barbisan, called Jamming, which was later converted into a unique, but more conventional, mine train coaster with a straight lift hill.
Also, Cyber Space at Grove Land and Galaxia at Wiener Prater are pretty odd, also made by Barbisan. Fish shaped, roofed cars, sort of like a Chance Toboggan, and a semi-enclosed track layout, kind of like Pirate's Cove or whatever that thing is in New Jersey by Wisdom Rides.
Speaking of that, that Wisdom roller coaster Pirates Cove or whatever it was is a one of a kind, I think. Kind of pointless from TPR's POV, as well.