ProQuest One Business
Includes several less prominent American newspapers.
Alternative Press Index
Indexes alternative, radical and left periodicals, newspapers and magazines. The focus is mostly American, but there are some Canadian, Australian and other international publications indexed.
Canadian Business and Current Affairs 
Includes newspapers, newswires, magazines, and newsletters and coverage of television and radio transcripts.
Gender Studies Database
To search newspapers or newspaper articles exclusively, select those options from the 'publication type' menu before searching. Includes articles from national and regional press, and smaller community and special-focus publications such as Surviv News.
Regional Business News
75 business journals, newspapers and newswires covering all metropolitan and rural areas within the United States. Full text.
Academic Search Complete
Under Publication Type, select Newspaper.
China Academic Journals
ViewsWire - Business intelligence on 203 countries
Economist Intelligence Unit provides daily information about key economic, political and market developments around the world.