Social Science Research & Instructional Council (SSRIC) - Extensive collection of social science data from ICPSR, Field Polls, and Roper Center.
Social Science Data Resources - SocioSite is designed to get access to information and resources which are relevant for social scientists. It has been designed from a global point of view.
National Center for Education Statistics - This web-based data analysis software provides public access to mostly individual-level education survey data collected by the US Department of Education. Users can build their own analysis tables, covariance matrices (with standard errors) for regression analysis, and, with DAS 2.0, perform weighted least-squares and logistic regression analysis on the web.
American Fact Finder - Census data including population, housing, economic and geographic information.
Bureau of Labor Statistics - Principal fact-finding agency for the Federal Government in the broad field of labor economics and statistics.
World Bank - A vital source of financial and technical assistance to developing countries around the world.