Quoting: Dunc

Quoting: slaapliedje1.x to 3.1 were Commodore releases
3.X (yeah that's the actual version) is owned by Cloanto (who makes Amiga Forever)
3.5 and 3.9 are owned by Haage & Partner, who no longer have rights to make more versions(?)
3.1.4.x and 3.2 are owned by Hyperion.

The above are all 68k releases. With 3.5 and 3.9 having some PPC support.
4.x is fully PPC, and has some pretty strict requirements.

This is without going into things like MorphOS and AROS/ApolloOS.

As I understand it, Cloanto, through a company called Amiga Corporation (formerly C-A Acquisition Corporation), basically owns all the former Commodore-Amiga IP now, going right back through the 8-bit days to the PET. This seems to include the licencing of 3.1 to Hyperion that the latter negotiated in settlement of the lawsuit in 2009 (C-A AC acquired “all Amiga-related rights” from Amiga, Inc.), and probably includes 3.5 and 3.9, since those were developed by H&P under contract for Amiga, Inc.

But I may be wrong. The last 20 years have been an absolute mess.