The American Brahms Society 
Contains general information, a list of publications, and Brahms research on the web.
http://pubpages.unh.edu/~dbmk/abs/The Charles Ives Society
Biography, bibliography, works, and descriptive catalogue.
http://www.charlesives.org/
International Machaut Society
Devoted to the study of poet and composer Guillaume de Machaut. Contains Machaut links and society newsletter.
http://www.vanderbilt.edu/~cyrus/machaut/
Havergal Brian Society
Official site. Diary of his life, listings of compositions, and society activities.
http://www.musicweb.uk.net/brian/
