From the Library of Congress. Search and view newspaper pages from 1880-1910 and find information about American newspapers published between 1690-present. Chronicling America is sponsored jointly by the National Endowment for the Humanities and the Library of Congress as part of the National Digital Newspaper Program.
ICON: International Coalition on Newspapers
Highlights and links to past, present, and prospective digitization projects of historic newspapers from around the world and in the U.S. (Most are free, some cost).