M64Py is a Qt4 front-end (GUI) for Mupen64Plus 2.
Swine is a graphical wine frontend, that makes it easy to install and run Windows software on Linux systems.
PlayOnLinux is a graphical wine frontend similar to CrossOver.
1 Jan 2006)
DBGL is a Java frontend for DOSBox, based largely upon the proven interface of D-Fend.
11 Dec 2012)
jGameBase is a Java port of GameBase, a fully-featured retro-gaming emulator frontend and game database utility (e.