File and mp3 tag renamer 

File And MP3 Tag Renamer is a powerful, easy-to-use multiple file and mp3 renaming utility. With this powerful program ,you can quickly and easily batch rename files and mp3's with a number of possibilities and options.
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MusicBrainz Tagger 

The MusicBrainz Tagger application allows you to automatically look up the tracks in your music collection and then write clean metadata tags (ID3 tags or Vorbis comment fields) to your files.
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