Open Educational Resources (OER) Sustainable Learning

Contains over 1 million images and photographs in the public domain.

30+ million digital objects from Europe's cultural institutions. Search results can be limited to those with non-restrictive licenses for reuse.

Flickr has millions of CC images that you can use (with attribution). Simply filter your search results by license type. Use the 'Share' option to embed images with proper CC attribution.

Foter allows you to search for and automatically create by-lines for websites or print.

The 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.

Contains over 22,000 photographs with no copyright restrictions.

A search engine for Creative Commons photos.

NYPL Digital Gallery provides free and open access to over 800,000 images digitized from the The New York Public Library's vast collections, including illuminated manuscripts, historical maps, vintage posters, rare prints, photographs and more.

Open Clipart is an online media collection of more than 160 000 vectorial graphics, entirely in the public domain.

Pixabay hosts "over 1.1 million images and videos" with public domain licenses (meaning that you don't need to provide attribution).

Red Stag has created a list of 85 Free Stock Photo Websites

A vast resource for avant-garde poetry, art, film, video, and audio.

Free to use, 2 million plus high quality photographs.