M.A.M.E. Catalog / Launcher II - also referred to as QMC2 - is the successor of one of the first UNIX MAME GUI frontends available on this planet called QMamecat (derived from MAMECAT, which was text-only).

QMamecat was based upon Qt 2; its development was frozen in 2003. QMC2 has been rebuilt from scratch as a Qt 4 project. Parts of the design and code were inspired by its predecessor, but it's not just a remake. We tried to make the new design as flexible as possible to minimize dependencies from frontend- and CLI-related MAME changes, which was a major deficiency of QMamecat. QMC2 now uses a template based emulator configuration scheme, which can easily be enhanced with additional command line options (defined in an XML template file).

As a result of this flexible design, QMC2 can be used for multiple emulators. Currently, only SDLMAME is supported.