Copyright-Free Media Sources

The following are a few sites which list public domain, copyright-free, or Creative Commons media sources. You can also do a Google search with the advanced options that will allow you to find Creative Commons images. The presence of a resource on any of these lists does not guarantee that all or any of the media in it are copyright-free. You are still responsible for checking the copyright status of media, and citing the source, where appropriate.

NOTE: Many images from the Internet are NOT appropriate for print use, as they are low resolution. Make sure that any images you use from the Internet are high enough resolution (again, use advanced search in Google to specify a size) for the intended use AND are not copyright protected!

Images
http://www.flickr.com/search/advanced (check at the bottom to search for Creative Commons-licensed content)
http://www.morguefile.com
http://en.wikipedia.org/wiki/Wikipedia:Public_domain_image_resources
http://www.nasa.gov/multimedia/index.html
http://calphotos.berkeley.edu/about.shtml
http://www.photolib.noaa.gov/

Audio
http://dig.ccmixter.org
http://incompetech.com
http://www.artistserver.com
http://www.jamendo.com/en/
http://freemusicarchive.org
http://www.mobygratis.com/film-music.html
http://www.freeplaymusic.com (please note that you CANNOT use freeplaymusic if your project will be broadcast in any way or entered in a contest/festival)
http://www.therecordist.com/free-sfx (sound effects)
http://www.findsounds.com (sound effects)
http://www.freesound.org (sound effects)
http://www.freesfx.co.uk (sound effects)
http://www.grsites.com/archive/sounds/ (sound effects)

Video
http://vimeo.com/groups/freehd
http://www.stockfootageforfree.com (registration necessary)
http://www.archive.org/details/movies
http://www.archive.org/details/stock_footage

Multiple Media Types
http://search.creativecommons.org/ (check each file for CC info)
http://commons.wikimedia.org/wiki/Main_Page (check each file for copyright info)
http://eduscapes.com/tap/topic98.htm
http://www.freemediaguide.com/index.html