Music IP
Service to identify musical tracks. ("a global search engine for music")
URL = http://www.musicip.com
Boing Boing calls it the free and open alternative to Gracenotes. MusicIP belongs to the MusicBrainz Foundation.
The service includes a database of 26 million fingerprinted audio tracks. The public domain track metadata from MusicBrainz returned by MusicDNS can be used freely for any applications by developers, organizations or enterprises.
More Information
Competitor of Gracenote
Commentary at http://www.dmwmedia.com/news/2007/01/11/musicip-challenges-gracenote-with-free-music-identification-service