This organization provides content creators the ability to license their work so that others may understand how it may be used.
Start at http://search.creativecommons.org
1) Enter search term
2) Make sure that the two boxes underneath are not checked.
3) Click on a box that relates to the type of media you need
4) Look for creative commons license on website to view creator's requirements of use
For more information visit http://creativecommons.org/licenses/ and click on the license
Attribution - Share Alike
Attribution - No Derivations
Attribution - No Commercial
Attribution - No Commercial and Share Alike
Attribution - No Commerical and No Derivations