http://search.creativecommons.org/

The search filters for searches of major search engine results to show only content licensed under the Creative Commons.

Remember that Creative Commons licenses are formed from a combination of these aspects according to the permissions assigned to the author wants his work:

• Recognition (Attribution): In any exploitation of the work authorized by the license must acknowledge authorship.
• No Commercial (non commercial): The exploitation of the work is limited to non-commercial use.
• No Derivative Works (No Derivate Works): The authorization to exploit the work does not include the transformation to create a derivative work.
• Share Alike (Share Alike): The operation involves creating unauthorized derivative works as long as they keep the same license to be disclosed.

The license Attribution-Share Alike (by-sa), is equivalent to free software licenses, any use allowed while the authors recognize and share the work with the same license.

But it must take into account that not all of Creative Commons licenses are so permissive. If Cercami content to make derivative works or commercial use, the search engine should use to mark the boxes for "commercial purposes" and / or modify, adapt, or build upon, so that the filter also acts on the contents do not allow such actions.

We must emphasize that the search does not offer guarantees, and we always verify the license of an image on their website or by contacting the original author.

The Creative Commons search is also available as add-on for Mozilla Firefox: http://wiki.creativecommons.org/MozCC .