Dupe Away

Dupe Away is the ultimate app for cleaning your iTunes music library. Dupe Away instantly analyzes your music library and sniffs out everything that's gone wrong.

• Clean Music & Video Dupes - The core feature of dupe away is finding your duplicate files and then automatically figuring out which ones to keep and which to delete.
• Detect Unused Media Files - Dupe Away contains a tool to detect music tracks on your computer that aren't in iTunes already. These tracks are just sitting on your computer taking up valuable disk space and with Dupe Away you can instantly find them and bring them back to iTunes or clean them up.
• Playlist Cleanup - No one likes listening to the same track over and over and that's why we built the playlist cleanup feature into Dupe Away. This feature finds and cleans duplicate track references in playlists.
• Remove Dead Tracks - If you've ever clicked on a track in iTunes and it didn't play, then you'll appreciate this tool which allows you to instantly get rid of those tracks in iTunes which don't have files.

Limitations:

Free music library analysis.