Calisphere - "The University of California's free public gateway to a world of primary sources."
Wellcome Images - 2,000 years of cultural history with themes ranging from medical and social history to contemporary healthcare and biomedical science. Over 150,000 digitized items including photographs, newspaper, political cartoons, works of art, transcribed oral histories, and other unique cultural artifacts from the libraries and museums of the UC campuses and a variety of cultural heritage organizations.
Retronaut - a wonderful ever growing collection of popular culture images. Search a wide variety of subjects such as "suffrage," "Monet," or "kitchen." Word of warning, can be habit forming.
National Gallery of Art implements an open access policy for digital images of works of art that the Gallery believes to be in the public domain. Images of these works are now available free of charge for any use, commercial or non-commercial.
National Gallery of Art - NGA Images is a repository of digital images of the collections of the National Gallery of Art. More than 22,000 open access digital images up to 3000 pixels each are available free of charge for download and use. NGA Images is designed to facilitate learning, enrichment, enjoyment, and exploration.
is an unique repository of over 6'800 medical images and videos,
pertaining to 1,700 topics and themes. This peerless database has been
created manually by HON and new image links are constantly being added
from the world-wide Web. HON encourages
of over 48,000 high-quality images spanning all of internal medicine,
all derived from Current Medicine's series of illustrated atlases. Each
image is accompanied by detailed explanatory text and citation of the