United States

BidRadar
Finds, sorts, and delivers business opportunities, contract award notices, and other bidding information by email every weekday.
http://www.bidradar.com/

BizStats.com
Industry specific financial and tax information on over 12 million U.S. businesses, including free online benchmarking.
http://bizstats.com/

DOT Office of Small and Disadvantaged Business Utilization
US Government Agency that encourages and assists small, women-owned, Native American and disadvantaged businesses to participate in Department of Transportation (DOT), and DOT-assisted, contracts and grants.
http://osdbuweb.dot.gov/

SBDC - Small Business Development Centers
SBA program to provide management assistance to current and prospective small business owners
http://www.sba.gov/sbdc/

SmallBiZ.com
Research, news, services, and practical advice for small business owners who are starting, operating, or selling their businesses.
http://www.smallbiz.com/

State Technical Assistance Programs
Links to small business assistance programs for each state related to innovation research and technology transfer.
http://sbir.gsfc.nasa.gov/SBIR/states.htm

UMSL, College of Bus. Admin., Small Business Resources
Aimed primarily at small businesses in Missouri, USA, this site has helpful resources, information and links of potential use to businesses in other locations as well.
http://www.umsl.edu/~smallbus

United States Small Business Administration
An electronic gateway of procurement information for and about small businesses. Search engine for contracting officers, marketing tool for small firms, and link to procurement opportunities and important information.
http://www.sba.gov/