Creative Commons Search"CC Search is a tool that allows openly licensed and public domain works to be discovered and used by everyone. Creative Commons, the nonprofit behind CC Search, is the maker of the CC licenses, used over 1.4 billion times to help creators share knowledge and creativity online."
Figshare"Figshare is a repository where users can make all of their research outputs available in a citable, shareable and discoverable manner."
Getty Open Domain ContentThe Getty makes available, without charge, all available digital images to which the Getty holds the rights or that are in the public domain to be used for any purpose. No permission is required.
Morguefile"A community-based free photo site, and all photos found in the Morguefile archive are free for you to download and re-use in your work, be it commercial or not. The photos have been contributed by a wide range of creatives from around the world, ranging from amateur photo hobbyists to professionals."
UnsplashThe Internet's source of freely usable images. Powered by creators everywhere.
Wikimedia Commons"Wikimedia Commons is a media file repository making available public domain and freely-licensed educational media content (images, sound and video clips) to everyone, in their own language."
BandcampRecordings with Creative Commons licenses.
National Jukebox"The Library of Congress presents the National Jukebox, which 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."