World Bank Resources:
EdStats, short for Education Statistics, is a comprehensive education statistics database developed by the World Bank’s Education Group of the Human Development Network in collaboration with Development Data Group in the Development Economics Vice-Presidency. It compiles data from a variety of national and international sources and provides information on key education topics.
World Development Indicators, World Development Indicators (WDI) is the World Bank's premier annual compilation of data about development. The 2005 WDI includes more than 800 indicators in 83 tables organized in 6 sections: World View, People, Environment, Economy, States and Markets, and Global Links.
World Health Organization's Health statistics and health information systems
United Nations Program on AIDS (UNAIDS), HIV Data