Business Source Premier 
Indexing (1984-present) and full text (1990-present) for journals covering business, management, economics, and more.

Reference USA  

Directory of U.S. business information (including contact names and estimated sales), telephone numbers and addresses, and U.S and Canadian high-tech companies (CorpTech). Allows custom searching to create lists of businesses by type of product, location, and more.

Regional Business News  
This database provides comprehensive full text coverage for regional business publications. Regional Business News incorporates coverage of 75 business journals, newspapers and newswires from all metropolitan and rural areas within the United States. It is updated daily.

Better Business Bureau   
Search for information about businesses, charities, and consumer complaints. You can fill out an online complaint form here for both American and foreign companies.