GameBase is an Open Source "Emulator Frontend", released under the GNU General Public Licence. It is a program that attempts to make running games on various emulators very easy, so that you don't have to remember lots of command line parameters and config settings. GameBase is the Official Frontend for the GB64 Collection of C64 games. It manages games, music, docs, screenshots and more
There is of course a GameBase CPC maintained by Loïc Daneels. He is adding .YM music, screenshots, scans of package and documentation.