Software also went the other way from Amiga to PC thanks to Brent Iverson, as with EA's DeluxePaint II Enhanced & III and DeluxePaint Animation. Many gaming titles used the former (Amiga? PC?) to create their graphics.
There were eventually Deluxe Paint versions for both DOS and Amiga. I think the Amiga one was first out as the PC graphics were more limited until VGA.
TIL: EHB, the "VGA Mode X" for Amiga.