Data Sets

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

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

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"

An index to research repositories, including data sets.