Aaron Copland Collection From the Library of Congress: "The first release of the online collection contains approximately 1,000 items that yield a total of about 5,000 images. These items date from 1899 to 1981, with most from the 1920s through the 1950s, and were selected from Copland's music sketches, correspondence, writings, and photographs."
AllMusic "AllMusic is a comprehensive and in-depth resource for finding out more about the albums, bands, musicians and songs you love. Songs and clips are available."
America Singing: Nineteenth-Century Song Sheets "Contains 4291 song sheets. Included among these American songs are ninety-seven British song sheets from Dublin and London. The collection spans the period from the turn of the nineteenth century to the 1880s, although a majority of the song sheets were published during the height of the craze, from the 1850s to the 1870s. Held by the Rare Book and Special Collections Division of the Library of Congress."
American Archive of Public Broadcasting "The Library of Congress and WGBH in Boston have embarked on a project to preserve for posterity the most significant public television and radio programs of the past 60 years: The American Archive of Public Broadcasting. The American people have made a huge investment in public radio and television over many decades, calculated at more than $10 billion. The American Archive will ensure that this rich source for American political, social, and cultural history and creativity will be saved and made available once again to future generations."
Dagomba Dance Drumming "Dagomba drumming is beautiful music. The traditional compositions presented on this site have wonderfully designed phrases that are compelling to hear, challenging to play, and rewarding to study. This site celebrates the cultural achievements of an African people and invites participation from a global audience."
IMSLP Petrucci Music Library This free resource provides access to over 350,000 compositions, 14,000 composers, 40,000 recordings, and 1.8 million audio tracks with additions on a daily basis. database. Allows the user to view handwritten copies of compositions form the masters, or crystal clear notations of famous selections of music
MERLOT "MERLOT is a curated collection of free and open online teaching, learning, and faculty development services contributed and used by an international education community."
National Jukebox "Historic recordings from the Library of Congress ... makes historical sound recordings available to the public free of charge. The Jukebox includes recordings from the extraordinary collections of the Library of Congress Packard Campus for Audio Visual Conservation and other contributing libraries and archives."
Notated Music Access over 97,000 items available online via the Library of Congress.
Yale Digital Content "Search nearly two million items and half a million images from across Yale's collections." Find Yale online courses, and museum items. Some content subject to copyright -- be sure to check.