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.
1lyrics - 1 lyrics is one app for all your lyrics need.
TuneUp - TuneUp makes your music fresh and clean!
Musixmatch - - World’s Largest Lyrics catalog and official
SongGenie - SongGenie analyzes, identifies and repairs your mp3 tags and names.
MetroLyrics - MetroLyrics is a searchable lyrics database featuring 1,000,000+ song lyrics from 20,000 artists. Use MetroLyrics to find your favorite song lyrics.