InterJazz

Internet plaza offering inexpensive websites for jazz musicians, clubs, festivals, management agencies and labels. Search function.
http://www.interjazz.com/

Jazz World Database

Directory of jazz bands, artists, management companies and labels. Site submissions.
http://www.jazzworlddatabase.com/

A Love Supreme

A guide to the ecstatic experience in jazz by Ian Scott Horst, from the John Coltrane recording of 1964 to biographies and discographies on Gato Barbieri, Alice Coltrane, John McLaughlin, Pharoah Sanders, Lonnie Liston Smith, Leon Thomas and McCoy Tyner.
http://www.jazzsupreme.com/

All Music Guide: Jazz

Introductory material on jazz sub-genres, periods and players with links to representative artists.
http://www.allmusic.com/cg/amg.dll?p=amg&sql=73:196

PeanutsJazz

Portal offering artist search, brief biographies and UK discographies, and sub-genre definitions.
http://www.peanutsjazz.com/

JazzWeb

Jazz directory hosted by Northwestern University and fueled by volunteer submissions. Links to map of stylistic influences as well as biographies, discographies, reviews, radio, books, movies, art, education, retailers and resources. Search function.
http://www.wnur.org/jazz/