Large repository of harmonized datasets from a variety of sources, with global and time series coverage. Datasets allow complete access to datasets using customizable tables, graphs and maps, with numerous output formats available (Excel, PDF, delimited text, SAS, SPSS, XML, Shapefile GIS).
Data-Planet Statistical Ready Reference is designed to allow users to quickly navigate the 35 billion points of data contained in the repository, representing 4.9 billion datasets covering thousands of geographic entities.
ICPSR (Inter-University Consortium for Political and Social Research) maintains an archive of more than 500,000 data files in the social sciences. Includes a bibliography of literature related to the data.