Sega Master
+ Help - Sega Master System + Game Gear
Emulators supported:
Funsion,
Gens,
Meka
Multiply Systems

These emulators support more than one system and then hince I recommered you to use subfolders for each system for your rom collection.
Example you should use roms/sms for Master games and roms/gg for Game Gear games.
Best use with GoodTools & Tosec sets
This collection use goodtools and tosec renamed romfiles. MultiFE scan both of these in one folder only and no subfolder is supported. All unique games is joined as a one game. When a user have selected a game, then a version of that game can been selected. MultiFE is also auto detect if year and company in Tosec files is detected, even you merge them with a Goodtools set.
More info about these database projects at GoodTools and Tosec