Musicbrainz music tagger

Been using it for a while, seem pretty good. No problems yet. Found out about it form ipodlounge.com

From site:
MusicBrainz is a community music metadatabase that attempts to create a comprehensive music information site. You can use the MusicBrainz data either by browsing this web site, or you can access the data from a client program — for example, a CD player program can use MusicBrainz to identify CDs and provide information about the CD, about the artist or about related information. You can also use the MusicBrainz Tagger to automatically identify and clean up the metadata tags in your MP3 collections. Find out more in the introduction.

The MetaBrainz Foundation, a tax-exempt non-profit corporation, operates the MusicBrainz project....

http://www.musicbrainz.org/