These resources allow you to look at the archives or back issues of a variety of newspapers, including historical newspapers, nationally and worldwide. They do not contain current articles.
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).
This collection from the Chronicling America site provides access to African-American papers published in 44 states between 1836-1922. Some full text is available.