Tune Sweeper - Show duplicates in your Music library. Automatically select which duplicates to keep and delete based on your preferences. Remove duplicates with one-click from your iTunes or Music app library.
Duplicate Cleaner - Duplicate Cleaner: the fastest and most popular tool for finding duplicate files. Over 1 million downloads: Get your copy now! Free and Pro versions available.
TuneUp - TuneUp makes your music fresh and clean!
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
SongGenie - SongGenie analyzes, identifies and repairs your mp3 tags and names.
AllDup - AllDup is a freeware tool for searching and removing file duplicates on your Windows computer.