MusicBrainz Picard
Picard is a cross-platform music tagger powered by the MusicBrainz database.
Download Picard
Picard supports all popular music formats, including MP3, FLAC, OGG, M4A, WMA, WAV, and more.
Picard uses the open and community-maintained MusicBrainz database to provide accurate information about millions of music releases.
Picard uses AcoustID audio fingerprints, allowing files to be identified by the actual music, even if they have no metadata.
Picard can lookup entire music CDs with a click.
Picard is licensed under GPL 2.0 or later, and is hosted on GitHub where it’s actively developed by some awesome developers.
Picard can find and download the correct cover art for your albums.
A flexible but easy to learn scripting language allows you to exactly specify how your music files will be named and how the tags will look like.
If you need a particular feature, you can choose from a selection of available plugins or write your own.
Picard helps you organize your music collection by renaming your music files and sorting them into a folder structure exactly the way you want it. A variety of plugins are available and you can even write your own. Picard supports a wide range of audio formats and can also lookup an entire CD for you.
Brought to you by 
MetaBrainz Foundation