KStella
kstella.sourceforge.net
A KDE frontend to the Atari 2600 emulator, Stella.
Kemulator
kemulator.sourceforge.net
A multi system open source frontend for Linux/KDE.
Raging Dragon
oscarcontrols.com
Skinable front end for MAME, Impact and Modeler.
BOSS MSX Frontend
members.ams.chello.nl
Frontend for the fMSX emulator.
EMUStation
zerosoft.zophar.net
Universal Frontend, featuring built-in IPS patcher, ZIP support, and Explorer integration.
Genesis LaunchTool
classicgaming.com
Header tool and launcher for Genesis emulators.
Hyper Em
classicgaming.com
Win32 graphical frontend for any command line launched emulator.
Game Launcher
dribin.org
A universal DOS front end for emulators.
GameBoy Mnu
geocities.com
Frontend for GameBoy 97