The World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.
The World Economic Outlook (WEO) database contains selected macroeconomic data series from the statistical appendix of the World Economic Outlook report.
The Organisation for Economic Co-operation and Development (OECD) promotes policies that will improve the economic and social well-being of people around the world. This site contains country profiles, data and statistics, and research reports.
Use the Statistics Database to generate trade profiles, tariff profiles, and services profiles for your country. (Note: not all profiles are available for all countries.)