Digital Public Library of America
A new project that seeks to link the thousands of Digital Collections on the web. Acts as both a portal to existing content and the platform for new content. Mission is to provide open access to the public and, "ensure that this critical, open intellectual landscape remains vibrant and broad in the face of increasingly restrictive digital options."
Library of Congress Digital Collections
Millions of resources - including the American Memory Project, photographs, advertisements, personal papers, government documents and historical recordings.
"free and open access to over 800,000 images digitized from the The New York Public Library's vast collections, including illuminated manuscripts, historical maps, vintage posters, rare prints, photographs and more."