ClrMamePro is a so-called ROM-manager for emulator MAME. It will help you keep your ROM collection up-to-date.

The project started in 1997 and was a command line based MS-DOS application but quickly a GUI (graphical user interface) was added.

ClrMamePro Features:

finding missing games, roms, samples
find and rename wrong named roms, samples
find and resize wrong sized roms
find wrong checksums (bad dumps, etc.)
find and remove unneeded files
merge and unmerge roms
rebuilding gamesets
add new sets