LibriVox
Free audiobooks of books that have been released into the public domain

Project Gutenberg
Public domain ebooks, some are audiobooks

ResearchChannel
This site provides research videos on a variety of subjects. It is sponsored by major colleges

American Memory Motion Pictures
The Library of Congress' motion picture collection

Kitzu (Multimedia kits for education)
Site that helps you to research and build a video or media project

American Memory: Motion Pictures
A collection of audio, video, and photos, etc. that “document the American experience.” From the collections of the Library of Congress, to serve as a public resource on the history of American culture.