There's also Amibian, which is precompiled distro that simply boots seamlessly into an Amiga emulator. For those who don't want to faff about with compiling or configuring Amiga emulation on their Pi.
I found this but it is quite old:
https://github.com/Amibian/amibian
[edit] this is better - https://gunkrist79.wixsite.com/amibian