Creative Commons (CC) Search Portal = http://search.creativecommons.org/ can be used to find "music, video, writing, code, or other creative works"!
NOTE: CC wisely advises "always verify that the work is actually under a CC license by following the link... If you are in doubt you should contact the copyright holder directly, or try to contact the site where you found the content." - From CC Search Portal
I admire and recommend Creative Commons for its continuing commitment to facilitate sharing and creating intellectual works worldwide, especially via the Internet. CC provides licensing options that are described simply and clearly enough to enable each of us to decide the preferred limits for others' use of our own work and to communicate those limits effectively and legally. - Steve Gilbert
More about Creative Commons & CC Search Portal
"There is no registration to use the Creative Commons licenses. Licensing a work is as simple as selecting which of the six licenses best meets your goals, and then marking your work in some way so that others know that you have chosen to release the work under the terms of that license.
"Our license-choosing tool can help you select the right license."
- from Creative Commons home page
When using the CC Search Portal, you can specify your needs/intentions by selecting either
"... use for commercial purposes;
"modify, adapt, or build upon."
You can also select among the following (as of 20110922) search engines to use for your search:
Open Clip Art Library Image
Wikimedia Commons Media
Mash-up of city skyline behind drawings of building blocks with media symbols "October’s newsletter focuses on CC’s newly launched annual fundraising initiative — the Build the Commons campaign. If CC is important to you, then I strongly encourage you to check out this edition of the ccNewsletter and to participate in the campaign. Thanks again to the CC Philippines team for designing the awesome PDF version." October 2008, Creative Commons
Permission By Creative Commons (here) [CC-BY-3.0 (www.creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
This file is licensed under the Creative Commons Attribution 3.0 Unported license.