"dig.ccmixter is devoted to helping you find that great music, all of which is liberally licensed under a Creative Commons license so you already have permission to use this music in your video, podcast, school project, personal music player, or where ever…"
"Soungle is a free site, developed by Southern Codes, for finding all kind of sound FX and musical instruments samples on our mega online library. As different from most of similar sites, Soungle is NOT a Web search engine. It only searches in our growing monster database. Our goals are to keep it simple to use (search, preview and download) and to keep it free."
With thanks to Kate Borowske at Bush Library, Hamline University.