Business

1. Alibaba.com: Claims to be the world's largest database of suppliers. Based in China, it is a marketplace of export and import, offers search, company directory, catalog, trade leads and more.
2. Bankersalmanac.com: provides intelligent reference data solutions to the banking industry for payments, due diligence, risk assessment and financial research.
3. Business.com: contains more than 400,000 listings within about 65,000 categories. Search results are preceded by four types of paid links.
4. Hoovers: A Dun & Bradstreet Company, maintains a database of over 23 million companies. Some information is provided free, other information is available to paid subscribers. Good for company stock information.
5. Kompass: 2.3M companies in 70 countries referenced by 57.000 product & service keywords 860.000 trade names and 4.6M executive names. A guide for worldwide sourcing.
6. Lexis Nexis: LexisNexis claims to be the "world’s largest collection of public records, unpublished opinions, forms, legal, news, and business information". Searchable archive of newspapers, public records & more.
7. ThomasNet: Powered by the Thomas Register of American Manufacturers (The Big Green Books published since 1898). Catalogs over 650,000 American companies in 67,000 categories.