Google Scholar

Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations. Google Scholar helps you identify the most relevant research across the world of scholarly research.
http://scholar.google.com

Bizjournals
The national bizjournals site features local business news from around the nation, updated throughout the day, top business stories from American City's print editions, industry-specific news from more than 40 industries, advice columns, and a full menu of tools to help business owners and operators manage their businesses more successfully. There's also easy navigation to each of the 42 local business sites.
http://www.bizjournals.com

The Brint Institute
Extensive community portals for Business Technology Management and Knowledge Management professionals. This site has research links for almost any area of interest.
http://www.brint.org

Federal Business Opportunities
"FedBizOpps.gov is the single government point-of-entry (GPE) for Federal government procurement opportunities over $25,000. Government buyers are able to publicize their business opportunities by posting information directly to FedBizOpps via the Internet. Through one portal – FedBizOpps (FBO) – commercial vendors seeking Federal markets for their products and services can search, monitor and retrieve opportunities solicited by the entire Federal contracting community."
http://www.fedbizopps.gov/

Forbes
Forbes magazine online.
http://www.forbes.com/

E-Marketer
*Research and Analysis on Digital Marketing and Media
*Objective Analysis of Internet Market Trends
*Data from Over 3,000 Worldwide Sources
http://www.emarketer.com/

IT Papers
An online library of technical white paper, Webcast, and case studies.
http://www.itpapers.com/

Knowledge@Wharton
A bi-weekly online resource, that offers the latest business insights, information, and research from a variety of sources.
http://knowledge.wharton.upenn.edu/

Marshall Goldsmith Library
"This library site is being continually expanded and will eventually include free material from many other great thinkers in leadership development. We welcome guests from around the world and have had visitors from 181 countries."
http://www.marshallgoldsmithlibrary.com/

Public Register's Annual Report Service
Order free annual reports covering 3,000+ companies.
http://www.prars.com/

U.S. Small Business Administration (SBA)
The SBA helps Americans start, build and grow businesses. Through an extensive network of field offices and partnerships with public and private organizations, SBA delivers its services to people throughout the United States, Puerto Rico, the U. S. Virgin Islands and Guam.
http://www.sba.gov/index.html

Strategy & Business
An online source that brings operations and marketing together
http://www.strategy-business.com/

Statistics of U.S. Businesses
Statistics of U.S. Businesses (SUSB) is a series that provides national and sub-national data on the distribution of economic data by size and industry. Statistics of U.S. Businesses covers most of the country's economic activity. The series excludes data on self-employed individuals, employees of private households, railroad employees, agricultural production employees, and most government employees.
https://www.census.gov/programs-surveys/susb.html

Thomas Register of American Manufacturers You must register to use but the service is free and enables a search of over 155,000 companies and 3,100 online supplier catalogs.
http://www.thomasnet.com/

World Bank e-Library Welcome to the World Bank e-Library, an online, fully cross-searchable portal of over 4,500 World Bank documents. The collection consists of over 1,800 World Bank publications and over 2,700 Policy Research Working Papers, plus each new book and paper as they are published.
https://elibrary.worldbank.org/