American Mavericks – The Listening Room (American Public Media)

Classical Live Online Radio

Cylinder Preservation and Digitization Project (6,000 cylinder recordings of popular commercial music from the late 19th and early 20th centuries) (U of California at Santa Barbara)

Glenn Gould Archive (National Library of Canada)

Historic American Sheet Music, 1850 - 1920 (Duke U) - 3,042 pieces

International Music Score Library Project

Lester S. Levy Collection of Sheet Music 

Music Resources on the Worldwide Web (Yale)

Music Treasures Consortium (online access to the world's most valued music manuscripts and print materials)

National Jukebox - Historical Recordings from the Library of Congress

The Open Goldberg Variations (Kimiko Ishizaka)

Oral History, American Music (excerpts) (Yale)

Smithsonian Global Sound

Virtual Gamelan (Cite Museum of Paris)

Virtual Instrument Museum (Wesleyan University)