Data Sets

"A community-maintained distributed repository for datasets and scientific knowledge."

A clearinghouse for open data from the U.S. federal government.

"A weekly newsletter of useful/curious datasets." Includes a spreadsheet of all featured datasets.

A website and visualization engine of public US Government data.

"Enables users to find datasets stored across thousands of repositories on the Web."

The Inter-university Consortium for Political and Social Research (ICPSR) provides access to an extensive collection of downloadable data sets.

A collection of public data sets.

"A collection of free datasets from Microsoft Research to advance state-of-the-art research in areas such as natural language processing, computer vision, and domain specific sciences."

A geotagged, curated list of 2600+ open data portals from around the world.

"Registry of Research Data Repositories"

"A web portal for discovering and requesting access to restricted microdata from federal statistical agencies."

An index to research repositories, including data sets.