ClassiCat for Windows from TDWare
(Music collection cataloging software) shareware download, ordering information.
http://www.tdware.com/

Cadenza
"Resources for classical and contemporary musicians": Basil Ramsey programme note library, multi-lingual classical music glossary, musicians' directory, international events list (sorted by country).
http://www.cadenza.org/

Classical Music Pages
History, composer biographies (with portraits and sound samples), explanations of musical forms; dictionary of musical terms. For "beginners" and professional musicians.
http://w3.rz-berlin.mpg.de/cmp/

Davidsbündler
Recounts the history of "The League of David," a satirical drive by composer Robert Schumann to "smite the Philistines" of 19th Century Europe.
http://members.aol.com/abelard2/davidsbuendler.htm

Ensemble
Covers all areas of music as taught in school, and sung or played in churches, synagogs, and communities: Jazz, the classics, pop and show; choir, band, or orchestra.
http://www.ensemble.org/

Classical Music Cube ... The Music Beat
Links: basic repertoire, record companies, music history.
http://www.search-beat.com/classic.htm

Classical Music at About.com
Articles, links, news, chat room.
http://classicalmusic.about.com/

Essentials of Music
Basic information about classical music, including eras, terms and composers, with audio examples.
http://www.essentialsofmusic.com/

Fugues and Fugue Sets
Large checklist of fugue sets and important fugues written in the last 300 years.
http://geocities.com/dhannotte/Fugues.htm

Chamber Music America
National association of professional chamber music provides links, calendars, email lists, publications, and grants.
http://www.chamber-music.org/

Chamber Music 2000
Project initiated by the Schubert Ensemble of London to commission a large number of works for piano and strings from leading composers, suitable for playing by young and amateur musicians.
http://www.chambermusic2000.com/

Classical Music Thematic Catalogers Index
Catalog of thematic catalogers (of composers' complete works), with links where available online.
http://members.tripod.com/~musiclassical/bwv.html

Classical Music Navigator
Brief information on composers, notable works, and forms and styles of music.
http://www.wku.edu/~smithch/music/index2.htm

The Classical Buffet
Features biographies, articles, and other information on classical music.
http://www.classicalbuffet.com/

The Music Chamber
Resource covering chamber music. Includes instruments, music theory, historical periods, composers, repertoire and audio samples.
http://library.thinkquest.org/27110/

Karadar Bertholdi Classical Music Dictionary
Dictionary of composers with brief biographies, catalogs of works, sound files: MP3, MIDI, and opera libretti.
http://www.karadar.it/

NPR Topics: Classical Music
News and articles from National Public Radio.
http://www.npr.org/rss/rss.php?id=1041

Classica
Pay-TV classical music channel from Unitel, offered in Europe and in Japan. Links to pages in German, Italian and Spanish.
http://eos.mercatus-doc.de//index.php5?sfwi=201&sfcr=&sfci=106581