Themefinder
Search by note names, intervals, or solfege to see matching classical themes or folk melodies in musical notation. From the Center for Computer Assisted Research in the Humanities at Stanford University.
http://www.themefinder.org

A2Gmusic.com
Resources, tips, news, classifieds, forums and music related databases. Includes information about copyrights, trademarks, marketing and locating a record label.
http://a2gmusic.com

Auralgasms
Biographies, discographies, sound samples, tour dates and user comments focusing on new artists.
http://www.auralgasms.com/

Music Player Network
Portal with artist interviews, news, equipment reviews, and forums.
http://www.musicplayer.com

Shavano Music Online
Self-help articles about band equipment, lighting systems, speakers, equalization, and business including contracts. Free submissions for bands seeking musicians and vice versa.
http://www.colomar.com/Shavano

Solo Performer
Veteran singer-songwriter Steve Rapson of Quincy, Massachusetts offers extensive self-help articles on practical aspects of being a working musician, including legal and music business issues.
http://www.soloperformer.com/

Who Does That Song
Find artists by song title or titles by artist, cross-referencing artists who have changed names or joined different groups.
http://www.whodoesthatsong.com

MSN Music Guide
Includes news, reviews, charts and links.
http://entertainment.msn.com/Music/

Glossary
Concise definitions of musical terms including form and theory, composers, instruments and historical eras, with RAM audio examples and purchase links. From Essentials of Music, online companion to the Essential Classics series of books published by W. W. Norton.
http://www.essentialsofmusic.com/glossary/glossary.html

American Hit Network
Reviews, release dates, music news, concert dates and reviews, music history, games and web radio.
http://www.americanhitnetwork.com

Hidden Songs.com
Lists hidden and unlisted tracks found on albums and CDs, accepting submissions from site users.
http://hiddensongs.com/

Grove Music Online
The mothership of musical scholarship offers links to nearly 50,000 articles, images and sound files from 6,000 contributors. Access by paid subscription, free trials and reduced rates available for libraries and schools.
http://www.grovemusic.com

Music-Atlas
Portal with artist and band biographies, polls, top ten lists and musician jokes.
http://www.music-atlas.com

SongTrellis
Collaborative site offering chord changes to more than a thousand tunes as submitted by contributors, along with chat forums and FAQs.
http://www.songtrellis.com/

Indiana University School of Music: Worldwide Internet Music Resources
Categorized links to musicians and ensembles, composers, research sources by musical topic, the business of music, and performance-related subjects including competitions, festivals and auditions, with search and site map.
http://library.music.indiana.edu/music_resources/

Online Tuning Fork
Click to hear sustained pitches including C, E, and concert A 440mHZ. With links to similar sites.
http://www.onlinetuningfork.com/

Center for Computer Assisted Research in the Humanities
Stanford University project founded in 1984 offers free public access to large databases and online tools for music research and scholarship. Includes printable scores, voice-leading checkers, and scores and MIDI files for koto and tabla.
http://www.ccarh.org/

Music Bibliography
Links to research materials, musical societies, scholarly journals, and various uncategorized sites annotated and maintained by Professor Bruce C. McIntyre of the Conservatory of Music at Brooklyn College (CUNY).
http://academic.brooklyn.cuny.edu/music/inetmus/#INDEX

Glossary for Music Bibliography
Definitions of terms used in music bibliography, both English and German, from the Arthur Friedheim Library at the Peabody Institute in Baltimore, Maryland, US.
http://www.peabody.jhu.edu/2352

Music Bibliography at IUP
Course syllabus and brief articles for students of Carl Rahkonen at Indiana University of Pennsylvania, with links to a dozen significant music libraries and online archives.
http://www.lib.iup.edu/depts/musiclib/MusBib/MusicBib_home.htm

Rhythm and Meter, A Bibliographic Glossary
Links to dozens of scholarly books and articles with glossary of terms, accepting user contributions. Created by graduate students at Indiana University in 1996.
http://www.music.indiana.edu/som/courses/rhythm/

Music Bibliography
Exhaustive text list of books on writing film scores as well as subjects such as composition, harmony and counterpoint, with links to sites on classical composition and composing for films. Maintained by Dimitrios Markatos.
http://members.aol.com/dmarko1/brahms/bibliography.htm

Computer Music bibliography
Large plain text annotated list of publications on MIDI, synthesis, and computer music, with links to music and artificial intelligence, maintained by Piet van Oostrum.
http://www.faqs.org/faqs/music/midi/bibliography/preamble.html

Evolutionary Music Bibliography
Companion to 2007 book discussing applications of evolutionary computation to music, by computer music professor Eduardo Reck Miranda of Plymouth, UK, and information technology professor (and trumpeter) Al Biles of Rochester, New York, US.
http://www.it.rit.edu/~jab/EvoMusic/EvoMusBib.html

Musician Biographies
Thousands of authoritative articles, many with discography, bibliography, and awards. In two alphabetized lists, individuals and bands or groups.
http://www.musicianguide.com/