WTO: http://www.wto.org

Institute for International Economics: http://www.iie.org

IMF: http://www.imf.org

World Bank: http://www.worldbank.org

United Nations Statistics Division: http://unstats.un.org/unsd

International Trade Administration, Office of Trade and Economic Analysis: http://www.ita.doc.gov/td/industry/otea

OECD: http://www.oecd.org

Bureau of Labor Statistics: http://www.bls.gov/data/home.htm

Penn World Table: http://pwt.econ.upenn.edu/

The Center for International Data at UC-Davis: http://www.internationaldata.org/

U.S. Census Bureau: http://www.census.gov/foreign-trade/sitc1

International Trade Center: http://www.intracen.org

Eurostat: http://europa.eu.int/comm/eurostat

Institute of Management Development: http://www.imd.ch/wcy

World Economic Forum: http://www.weforum.org

Jon Haveman's International Trade Data: http://www.macalester.edu/research/economics/PAGE/HAVEMAN/Trade.Resources/TradeData.html