AMG All Music Guide
http://www.allmusic.com
Complete, cross-genre online catalog for music. Contains exhaustive artist/performer guides, discographies, and music samples. Also includes searchable glossary for music terminology.

All Classical Guide
http://www.allclassical.com/
Comprehensive guide to classical music, including composer information pages, music glossary, discussion of music by genres and period.

Music Searcher
http://www.musicsearcher.com
Basic search engine for music and performers, providing links to relevant web sites.

Music Resources
http://www.educationindex.com/music/
Offers links to educational web sites related to music.

UCSB Library Music Resource Guide
http://www.library.ucsb.edu/subj/music.html
Provides links regarding various facets of music related research.

Yale University Library Guide to Music Resources on the Web
http://www.library.yale.edu/musiclib/webres.htm
Alphabetical inclusive guide to the available resources on the web for music research.

BBC Music
http://www.bbc.co.uk/music/
Artist database encompassing most genres of Western music.

MPA Directory of Music Publishers
http://www.mpa.org/agency/pal.html
The Music Publishers’ Association (MPA) on-line directory.

Music Notes
http://www.thinkquest.org/library/site_sum.html?tname=15413&url=15413/
"An interactive online musical experience." The basics of music theory.

Ovation Arts Index
http://arts.ovationtv.com
Extensive directory for art related material on the internet. Various search engines available that range from general to specific in their breadth of search.