The Proquest Historical Newspapers offer full page and article images with searchable full text back to the first issue. Each newspaper collection includes digital reproductions providing access to every page from every available issue.
Users can cross-search titles.
http://www.loc.gov/chroniclingamerica/
This site allows you to 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 (NDNP).