MAMEDiff makes it easy to identify ROM related changes in a new release of MAME (it can even find game additions that aren't mentioned in whatsnew.txt). It can spot game renames and will not regard them as one game deleted and another added. When ROMs or games are renamed (or if there is a change in the way that sets are merged), MAMEDiff will just tell you how to rebuild the affected sets (i.e. no downloading required). A must-have for any MAME fanatic! It also works for new releases of MESS, RAINE, Final Burn Alpha, Kawaks, etc.