On this page there are the main frontends (all those programs that provide an interface between the user and the emulator). You can find more at MAMEWorld and zophar.net.

ATTRACT-MODE - http://attractmode.org/

BLETCHMAME - https://www.bletchmame.org/

BLUEMSX LAUNCHER - http://msxlaunchers.info/

C64 MEMORIES - http://www.genereavventura.com/hosted/c64memories/

D-FEND RELOADED - http://dfendreloaded.sourceforge.net/

DAPPLEGREY - http://www.classics-for-x.info/csx/dapplegrey/index.htm

DBFRONTEND - https://sourceforge.net/projects/dbknitofrontend/

DOSBOX GAME LAUNCHER - https://dbgl.org/

DOSPANEL - https://www.rathlev-home.de/index-e.html?home-e.html#dospanel

EMULA - https://www.a-mc.biz/_software/emula/

EMULATION STATION - https://emulationstation.org/

EMULATION STATION DE - https://es-de.org/

EMULATOR CABINET - https://soggymustache.net/emucab.html

EMULATORS ORGANIZER - https://www.zophar.net/frontends/universal/emulation_runner.html.html

EMULOADER - https://emuloader.mameworld.info/

EROCKUS - http://erockus.elementfx.com/arcade.html

EXTRAMAME - https://www.wintools.net/extramame/

FEEL - https://feelfrontend.altervista.org/

FRONTRASH - https://www.zophar.net/frontends/universal/frontrash.html

FUNEMUSTATION - https://dannygaray60.itch.io/funemustation-launcher

GAMEBASE - https://www.bu22.com

GAMEEX - https://www.gameex.com/

GAMEEX EVOLUTION - https://www.gameex.info/forums/files/file/2245-gameex-evolution/

GAME LAUNCHER - https://www.dribin.org/dave/game_launcher/

HYPERSPIN - https://hyperspin-fe.com/

ICE - https://scottrice.github.io/Ice/

IXBAR3000 - https://imxn.net/wordpress/

KYMAERA - https://sourceforge.net/projects/kymaera/

LAUNCHBOX - https://www.launchbox-app.com/

LEMON LAUNCHER - https://sourceforge.net/projects/lemonlauncher/

LUDO - https://ludo.libretro.com/

LUSSPACE FE - https://www.zophar.net/frontends/universal/lusspace-fe.html

MAME CLASSIC - https://mameclassic.mameworld.info/

MAXIMUS ARCADE - https://www.maximus-arcade.com/

MESS FRONT - https://www.zophar.net/frontends/universal/messfront.html

METROPOLIS LAUNCHER - https://metropolis-launcher.net/

MGALAXY - https://www.mgalaxy.com/

NAMDHC - https://github.com/umageddon/namDHC/

NEGAMAME - http://babelsoft.net/products/negamame.htm

NEGATRON - http://babelsoft.net/products/negatron.htm

NOSTLAN - https://github.com/quinton-ashley/nostlan

PEGASUS - https://pegasus-frontend.org/

PFEMAME - https://sourceforge.net/projects/pfemame/

PINBALLX - https://www.pinballx.com/

PSX LAUNCHER - https://ngemu.com/threads/psx-launcher.172273/

QMC2 - https://qmc2.batcom-it.net/

QUICKPLAY - https://sourceforge.net/projects/quickplay/

RETROFE - http://retrofe.nl/