Dupe Eliminator for iTunes!

Tune Sweeper 4 is an easy to use utility which lets you quickly and easily clean up your iTunes Library. Tune Sweeper can scan your iTunes library for duplicate tracks based on your preferred search criteria. It displays your iTunes duplicates in groups so that you can easily select which of the tracks you want to remove from your iTunes at the click of a button. To help users tidy up their iTunes library further, Tune Sweeper also contains the ability to find and delete missing tracks in iTunes, as well as being able to locate any tracks on your hard drive which are not currently in iTunes and add them to your library if required. Tune Sweeper 4 can also find and download any incorrect track data for your songs, fixing any tracks labelled “track 01”, “track 02” etc. Furthermore, Tune Sweeper can download any missing album artwork for you to complete your music collection, as well as allowing users to view a quick overview of their iTunes statistics. Tune Sweeper is compatible all versions of iTunes. Tune Sweeper is available as a free trial download for Windows. The full version of the software costs $24.99, giving access to all functionality, free customer support and a lifetime of free point software updates. »

CopyTrans TuneTastic does a full iTunes cleanup: delete iTunes duplicate songs, get missing album artworks, fix iTunes missing songs, find orphan songs and import them in iTunes

Leawo Tunes Cleaner is a powerful iTunes cleanup tool, which can help you to delete duplicates in iTunes and get album artwork for iTunes music files.With it, you can clean up iTunes music library fast and comprehensively.

Dupin Lite is your iTunes duplicates manager.

An easy-to-use way to clean up your music library without losing the good stuff! Song Sergeant intelligently identifies and removes duplicates, renames inconsistently named artists and albums, reunites orphaned song files to your library, and deals with missing song files.Features:• Finds and removes duplicate song files• Intelligently merges the best song information with the best audio data• Preserves your playlists while removing duplicates• Identifies inconsistently named artists and albums• Discovers orphaned song files within your music folder but not seen in iTunes• Reunites missing library songs with orphaned files• Fix problems quickly and automatically — or with great manual control• Detailed "related songs" section helps you make decisions »

iTunes has a “Show Duplicates” command, but it is of limited use. It offers no way to remove duplicates while keeping one version of a song. It can’t identify which songs are duplicates as opposed to different recordings of the same song.

iTunes Duplicate Song Manager with Folder Watch removes iTunes duplicates in Windows and Mac OS X. iTunesDSM can also watch a folder and automatically add new files to iTunes safely.