The Open Content Program is making over 4,600 high-resolution images of the Museum's collection of public domain artworks free to use, modify, and publish for any purpose.
Wikimedia Commons is a media file repository making available public domain and freely-licensed educational media content (images, sound and video clips) to everyone.
Creative Commons Search offers a convenient way of searching for content created under a CC licence across search services provided by other independent organizations such as Flickr, YouTube and Google Images.