Atari ST and Amiga mice, too. However, the USB to Amiga/Atari mouse adapters available on eBay and elsewhere are made for the opposite use case, connecting a modern USB (or, in some cases, PS/2) mouse to an original Atari ST or Amiga.
Interesting! I actually bought & assembled a PS/2 to Amiga adapter a while back, so I could plug one of my many 3-button Logitech mice into an Amiga.
In my experience, the majority of old mice were not very good, so it's not surprising that most adapters go in the opposite direction (new mouse into old computer).
