http://search.creativecommons.org/?lang=es
http://www.freephotobank.org/main.php
http://blog.flickr.net/en/2011/10/05/200-million-creative-commons-photos-and-counting/
http://animalphotos.info/a/
http://www.budgetstockphoto.com/creative_commons_images.html
The above icon specifies that you can use the specified content for free in non-commercial applications, provided that you attribute (link back) as specified.
"You let others copy, distribute, display, and perform your copyrighted work — and derivative works based upon it — but only if they give credit the way you request."
"You allow others to distribute derivative works only under a license identical to the license that governs your work."
"You let others copy, distribute, display, and perform your work — and derivative works based upon it — but for non-commercial purposes only."
"You let others copy, distribute, display, and perform only verbatim copies of your work, not derivative works based upon it."
The above information was sourced from the creative commons licenses information page.
Creative commons is just one of several license types that are commonly used in the stock photography industry to allow photographers and buyers to use and control image use. Read more about stock photography licenses.
