Google Digitized Newspaper Collection
Provides access to hundreds of newspapers across the world. Most are local rather than major newspapers.
Historical Worldwide Newspapers Online: Europe
A guide to free Internet sources of historical newspapers created by Bowling Green State University.
ICON - International Coalition on Newspapers
Provides links to digitization projects of historic newspapers. Only those newspapers without the dollar icon are for free access.
Newspapers - European History Primary Sources
A sub-collection of European History Primary Sources focusing on historical newspapers.