Will add custom guitar tracks, custom drum tracks, or custom bass tracks to your digital recording. Styles from rock, blues, jazz, and country.
http://www.studio-aid.com/
Directory of popular downloads for your cell phone. Includes several populary music artists.
http://www.ringtone-search-engine.com/
Provides royalty free music, music software, loops, midi files, education, production, and an online facility for recording artists.
http://www.loopwise.com/
Free MIDI files, sorted in alphabetical order, in an easy-to-use interface. Also features song lyrics, MIDI community, and movie themes.
http://www.coolmidi.250x.com/
Free music library of production music. Search and audition real-time, download mp3 files. For use in broadcast, Web and media.
http://www.royalty-free.tv/
Corporate music for use in webpages, broadcast, film and theatre.
http://www.tracks4.com