Creative Commons Search lists resources to locate copyright-clear images. Do not assume that the results displayed in this search portal are under a CC license. You should always verify that the work is actually under a CC license by following the link.
Many libraries, archives, museums and other organizations make their collections available online, mainly for scholarly and research purposes.
Photo-sharing sites allow individuals to upload their own photos and make them searchable by descriptive tags . Some images on these sites may be used under Creative Commons licensing, at the discretion of the poster. Sites include:
Flickr has introduced The Commons, where member institutions make available images that have no known copyright restrictions. Some of the participating institutions include the Library of Congress and the Musée McCord Museum in Montreal.
Other institutions are making some collections available independent of The Commons, including Library and Archives Canada and the Boston Public Library, most of these images are available for use under Creative Commons licensing.