Newspapers

New York Times
If you are looking for a New York Times article published since January 1, 1981, search Article Archive: 1981-Present. Articles are free back to 1987. Photographs, charts and other illustrations are not included.
If you are looking for a New York Times article published from September 1851 to December 1980, search Article Archive: 1851-1980. Articles in the Public Domain (1851-1922) are free.
Newseum
Front pages from over 500 worldwide newspapers.
Internet Public Library: Newspapers
Newspapers from around the world from the Internet Public Library, a public service organization founded by the University of Michigan School of Information.
Foreign Language News & Newspapers
Electronic journals, newspapers and magazines are available in Chinese, French, German, Italian, Japanese, Portuguese, Russian, and Spanish from MIT, Massachusetts Institute of Technology.

Open Access

Arxiv -- Cornell University
Computer science, physics, mathematics, non-linear science, quantitative biology and statistics journals.
BioMed Central
Biology, medicine, psychosocial medicine, chinese medicine and journals in related areas.
CiteSeer -- Penn State University
Computer and information science papers.
CogPrints -- University
Psychology, neuroscience, biology, linguistics and computer science.
Digital Library of Information Science and Technology -- Arizona University
Articles in library and information science and information technology.
Directory of Open Access Journals -- Lund University Library
This is the most important directory of open access journals. However, access to the journals is only possible by browsing the A-Z title list.
Highwire Press -- Stanford University
Full or partial free access of scientific and medical journals.
OAlster find the pearls. -- University of Michigan
A union catalog of digital resources.
PubMed Central -- U.S. National Institutes of Health (NIH)
Biomedical and life sciences journals
Public Library of Science
Biomedical literature from a nonprofit organization of scientists and physicians committed to making the world's scientific and medical literature a freely available public resource.
WHO Health InterNetwork Access to Research Initiative
Biomedical and health literature.