United Nations Statistics Division - National Accounts Official Country Data
Official national accounts statistics in national currencies as provided by the National Statistical Offices.
http://unstats.un.org/

United Nations Statistics Division - United Nations Common Database
Selected series from numerous specialized international data sources for all available countries and areas.
http://unstats.un.org/

LABORSTA
International Labour Office database on labour statistics, countaining data and metadata for over 200 countries or territories.
http://laborsta.ilo.org/

United Nations Statistics Division - Millennium Development Goals
Official data, definitions, methodologies and sources to measure progress towards the Millennium Development Goals.
http://unstats.un.org/

United Nations Statistics Division - National Accounts Estimates of Main Aggregates
National accounts estimates for most countries and areas from 1970 onwards.
http://unstats.un.org/