Snes9x Next - Super Nintendo
FCEU_MM - Nintendo Famicom / NES
Gambatte - Gameboy & Gameboy Color
VBA Next - Gameboy Advance
Final Burn Alpha - Arcade (Also separate cores for NEOGEO (fba_cores_neo) and CPS1/2 (fba_cores_cps))
PR-Boom - Doom, Doom 2 etc.
iMame4All - Arcade (Based on Mame 0.37b5)
Genesis-Plus-GX 1.7 - Sega Genesis / Megadrive, Master System, Game Gear, SG1000 & Sega CD / Mega CD
Mednafen_PCE_fast - NEC PC-Engine / Turbo Grafix 16 & CD, Super Grafx
Mednafen_wswan - Bandai Wonderswan
Bugs & Issues
iMame4All - Save states and rom reloading not working
Mednafen_PCE_fast - Save states not working
Mednafen_wswan - Save states not working
Genesis-Plus-GX - CD audio tracks still not working
Final Burn Alpha - Based on version 0.2.97.26. Make sure you have the right ROMs or you will have problems.
Genesis-Plus-GX - Sega CD Emulation requires a sega cd bios in the same folder as your ISO / BIN files. The BIOS ROM files be named BIOS_CD_J.bin (Japan), BIOS_CD_U.bin (US) and BIOS_CD_E.bin (Europe)
Mednafen_PCE - PCEngine / Turbo Grafix CD Emulation requires the PCE CD BIOS to be in the same folder as the ROM you are trying to load. It needs to be named SYSCARD3.PCE
iMame4All - Based on Mame Version 0.37b5, again make sure you have the right romset.