The ultimate goal of the IMSLP is to gather all public domain music scores, in addition to the music scores of all contemporary composers (or their estates) who wish to release them to the public free of charge.
This archive is "a collection of websites of musicians, performers, and composers contributing to the American music scene. The collection strives to be representative of all genres of music, including jazz, classical, country, rock, Latin American, hip hop, rap, R&B, blues, EDM, heavy metal, bluegrass and many more." American Music Creators Web Archive rights and access info
A collection of free sound recordings (mostly music, but also some audiobooks). A project of the Internet Archive. Files may not be in the public domain - check the individual file for copyright/licensing info.
From the Global Jukebox About page: "The Global Jukebox explores connections between families of expressive style. ... Thousands of examples of the world’s music, dance and other expressive behavior are available here. The Global Jukebox is presented as a free, non-commercial, educational place for everybody."
A collection of open access and public domain sheet music, recordings, and textbooks. Primarily features classical music. Musopen licensing information
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