★ flickr
Flickr is almost certainly the best online photo management and sharing application in the world. Many Flickr users have chosen to offer their work under a Creative Commons license, and you can browse or search through content under each type of license.
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. Unlike traditional media repositories, Wikimedia Commons is free. Everyone is allowed to copy, use and modify any files here freely as long as they follow the terms specified by the author; this often means crediting the source and author(s) appropriately and releasing copies/improvements under the same freedom to others. The license conditions of each individual media file can be found on their description page. The Wikimedia Commons database itself and the texts in it are licensed under the Creative Commons Attribution/Share-Alike License
★ Art Images for College Teaching (AICT)
AICT is a royalty-free image exchange resource for the educational community. Art Images for College Teaching (AICT) began as a personal project dedicated to the principle of free exchange of image resources for and among members of the educational community. While the AICT site is maintained and distributed under the general auspices of the Minneapolis College of Art & Design (MCAD), this institution is not responsible for content or use thereof. All work on the AICT project has been voluntary, and MCAD-affiliated personnel have contributed innumerable hours of research, clerical, and design effort on a pro-bono basis. Use of the images displayed on this website has also been contributed on a non-royalty basis for the public good.