Amigaworld member fishy_fis has released ports of 2 Emulators for AmigaOS (68k) They are:-
is a 68k amiga os port of the popular sega megadrive emulator.
is a 68k amiga os port of the Atari ST emulator based on 0.50 sources. It suports all versions of TOS and limited Gem support. Also supports 68000/68020/68040 cpus, gfx cards and harddrives
All the above are designed for Classic/68k Amiga/MOS and Amithlon users.