"The United Nations Statistics Division (UNSD) of the Department of Economic and Social Affairs (DESA) launched a new internet based data service for the global user community. It brings UN statistical databases within easy reach of users through a single entry point (http://data.un.org/). Users can now search and download a variety of statistical resources of the UN system." from web site
WDI Online is the premiere data source on the global economy. It contains statistical data for over 600 development indicators and time series data for over 200 countries and 18 country groups. Data includes social, economic, financial, natural resources, and environmental indicators. Results can be scaled, indexed against a particular year, viewed by percentage change, and charted.