DPLA : Digital Public Library of America
The Digital Public Library of America brings together the riches of America's libraries, archives, and museums, and makes them freely available to the world.
folkstreams.net.
A significant collection of documentary films, accessible in streaming video, about folk culture in the U.S.
Library of Congress - American Memory
Presents digitized page images from various Library of Congress collections in American history.
Making of America
A digital library of primary sources in American social history from the antebellum period through reconstruction.
WWW-VL: HISTORY: UNITED STATES
Virtual Library's directory of websites in American history. Topical areas include Women's History, Ethnic Studies, Urban History, and more.
