iDupe is a smart duplicates scanner for iTunes. iDupe tries to deal with duplicate songs or albums in iTunes in a smart way.
Features:
* Can make smart judgement calls about duplicates
* Lets you make final judgement calls before removing or deleting anything
* Can remove tracks from playlist and/or library relatively fast
* Can move files to trash and also trash empty parent folders
* Built as universal binary.
iDupe is Shareware, $8...But released under the GPL. (Say what?)