Amiga:
- WinUAE [???]
Apple:
- AppleWin [GNU GPL]
Atari:
- Stella [GNU GPL]
DOS:
- DOSBox [GNU GPL]
IA-32
Sega Master System:
- SMS Plus/SDL [GNU GPL]
- Osmose [GNU GPL]
Sega Genesis / Mega Drive
- Generator [GNU GPL]
PowerPC:
- PearPC [GNU GPL]
Sega Genesis / Sega CD / Sega 32X:
- Gens [GNU GPL]
Sega Dreamcast:
- Swirly [GNU GPL]
Sega Saturn:
- Yabause [GNU GPL]
Super Nintendo
- ZSNES [GNU GPL]
Nintendo 64
- Nintendo 64 [GNU GPL]
ZX Specrum
- Fuse [GNU GPL]
Other
- QEMU [GNU GPL/GNU LGPL/MIT/BSD]
Misspellings: wmulators, smulators, dmulators, rmulators, 4mulators, 3mulators, enulators, ekulators, ejulators, emylators, emhlators, emjlators, emilators, em8lators, em7lators, emukators, emupators, emuoators, emulztors, emulstors, emulwtors, emulqtors, emularors, emulafors, emulagors, emulayors, emula6ors, emula5ors, emulatirs, emulatkrs, emulatlrs, emulatprs, emulat0rs, emulat9rs, emulatoes, emulatods, emulatofs, emulatots, emulato5s, emulato4s, emulatora, emulatorz, emulatorx, emulatord, emulatore, emulatorw, mulators, eulators, emlators, emuators, emultors, emulaors, emulatrs, emulatos, emulator, meulators, eumlators, emluators, emualtors, emultaors, emulaotrs, emulatros, emulatosr, eemulators, emmulators, emuulators, emullators, emulaators, emulattors, emulatoors, emulatorrs, emulatorss