search.creativecommons.org will query major search engines(Google, Yahoo!, and Flickr) for materials which uses Creative Commons licenses(CC). This tool will help you find photos, music, text, books, educational material, and more which is build upon utilizing Creative Commons or free to share. You have to option to search for works you can use for commercial purposes and also search for works you can modify, adapt, or build upon.
Finding legal photos, videos, music, website articles, blogs, publications, and other materials are getting lot easier because of the of the Creative Commons licenses(CC). Here is the explanation for what is Creative Commons Licenses and how to adopt it.