More than 180,000 of the items in NYPL's Digital Collections are in the public domain

All the historical works found on this site are in the public domain, at least somewhere in the world.

"Our digital library preserves the published record for durable, long-term, and lawful access, stewarded in partnership with the academic institutions supporting our work."

Search, save and share art, books, films and music from thousands of cultural institutions

"Wikimedia Commons only accepts free content... that [is] not subject to copyright restrictions which would prevent them being used by anyone, anytime, for any purpose."

NASA content - images, audio, video, and computer files used in the rendition of 3-dimensional models, such as texture maps and polygon data in any format - generally are not copyrighted.

Flickr features many images licensed with Creative Commons

DPLA allows you to access digital collections created by libraries, universities, and archives. Some are in the public domain but not all--check items individually.

The Library of Congress has made digitized versions of collection materials available online since 1994. Many (not all) materials are in the public domain.

Includes a filter for unrestricted images.

The Getty recently started an Open Content Program to "share images of works of art in an unrestricted manner, freely, so that all those who create or appreciate art…will have greater access to high-quality digital images for their studies and projects." You can find these images by conducting a search on the Getty Search Gateway and then filtering your results by checking the box next to "Open Content Images", which is the second option in the Highlights section of the filters in the left menu. All images found through this program should be credited as "Digital image courtesy of the Getty's Open Content Program" (see http://www.getty.edu/about/opencontent.html).

This is a community music remixing site featuring remixes and samples licensed under Creative Commons licenses.

Jamendo users can share their music using Creative Common licenses.