CIA (Central Intelligence Agency) World Factbook
The World Factbook provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.
OECD (The Organisation for Economic Co-operation and Development)
The OECD provides a forum in which governments can work together to share experiences and seek solutions to common problems.
WDI (World Development Indicators)
The primary World Bank collection of development indicators, compiled from officially-recognized international sources. It presents the most current and accurate global development data available, and includes national, regional and global estimates.