OpenRefine (formerly Google Refine) is a powerful tool for working with messy data: cleaning it; transforming it from one format into another; and extending it with web services and external data.
The Current Population Survey (CPS), sponsored jointly by the U.S. Census Bureau and the U.S. Bureau of Labor Statistics (BLS), is the primary source of labor force statistics for the population of the United States.
Access tables, maps, and data profiles collected from the U.S. Census Bureau, the federal government’s largest statistical agency on America's people, places, and economy.
The Inter-university Consortium for Political and Social Research (ICPSR) maintains a data archive of more than 250,000 files of research in the social and behavioral sciences.
The Magazine of Early American Datasets (MEAD) is an online repository of datasets compiled by historians of early North America. MEAD preserves and makes available these datasets in their original format and as comma-separated-value files (.csv). Each body of data is also accompanied by a codebook.
Code for America works shoulder to shoulder with community organizations and government to build digital tools and services, change policies, and improve programs.