MAMEUI, formerly MAME32, is the GUI version of MAME. Originally authored in 1997 by Chris Kirmse, it was the first port of MAME™ to the Windows platform. MAMEUI is currently in maintenance mode with no active development taking place. The 64-bit version is still compiled and released when there is no breakage with the core.
This is the 32-bit version of MAMEUI. If you have a 64-bit system, the 32-bit version is recommended.