Snes9X is one of the most popular Super Nintendo emulators out there. Mostly because its ported to many operating systems out there. Now Final Edition version of AmigaOS 4.1 have got a port also, made by HunoPPC, Nouvel Hugues. He is part of the Amiga French Team that creates lots of nice ports for AmigaOS 4.1
To be able to play Super Nintendo games on Snes9X you need to find roms. Most of the games are abandonware, but be aware. Some of the games is sold commercialy for Wii and Wii U still. Just check it out before you download.
IMPORTANT: Snes9x was compiled with the new SDK therefore it needs AmigaOS 4.1 Final Edition. So, it wont work with previous AmigaOS 4 versions of the operating system.
Get it Here
Also check out his other ports at hunoppc.amiga-projects.net