Site: Project Gutenberg URL: http://www.gutenberg.org Rights: http://www.gutenberg.org/wiki/Gutenberg:Terms_of_Use Description: This site provides access to over 50,000 free digitized ebooks that are in the Public Domain.
Category: Public Domain Sources
Public Domain Source 5
Site: LibriVox URL: https://archive.org/details/librivoxaudio Rights: https://archive.org/details/librivoxaudio&tab=about Description: This site features free audiobooks read by volunteers of Public Domain books, poems and short stories.
Public Domain Source 4
Site: Prelinger Archives URL: https://archive.org/details/prelinger Rights: https://archive.org/details/prelinger&tab=about Description: This site features over 60,000 digitized films from various industries and also includes films by amateurs.
Public Domain Source 3
Site: NASA-GRIN URL: http://grin.hq.nasa.gov Rights: http://grin.hq.nasa.gov/copyright.html Description: This site includes access to over a thousand of NASA’s high resolution photographs from significant moments in history.
Public Domain Source 2
Site: Chronicling America URL: http://chroniclingamerica.loc.gov Rights: http://chroniclingamerica.loc.gov/about/ Description: This site provides digitizations of select newspapers from 1836-1922.
Public Domain Source 1
Site: Hathi Trust URL: https://www.hathitrust.org Rights: https://www.hathitrust.org/access_use#pd Description: This site features millions of digitized books from around the world.