The Creative Commons Search searches popular search engines and collections for items that are labeled for reuse through CC.

NOTE: You should always verify that the work is actually under a CC license by following the link.

Using the drop down menu on the upper left of the flickr advanced search page, you click on "any license" to choose a license you want to search under. "All Creative Commons" and "U.S. Government Works" are both good choices.

The Commons is a collection of publicly-held photography collections. Under "The Commons," cultural institutions that have reasonably concluded that a photograph is free of copyright restrictions are invited to share such photograph under their new usage guideline called "no known copyright restrictions."

Over 16 million freely usable media files. Like Wikipedia, anyone can contribute to the collection. Copyright and licensing information is provided for every image.

Links to the digital collections of the Library of Congress. Check each collection for information on use and attribution of images.

Over 800,000 images, video and other items from the Smithsonian collection. Non-commercial use of the content is allowed as long as you cite the author and source, and link to the SI Website.

Mostly historic images from around the state. Rights information is provided in the item details.

Notice that you can filter by "usage rights" to find images that are licensed for reuse.