This is a great multi-emu frontend with a lot of features including advance features for MAME, Virtual Tree, Emu-Finder, an IPS system, Directory Mirroring, Zip support for emus that don't support it, and much more. It also supports a whole slew of emulators. Check it out!
Author's website: http://www.smackdown-hotel.fsnet.co.uk
Operating System: Windows