OPEN DATA, DATASETS, UNIVERSITY REPOSITORIES

AidData - Open data for international development

DataHub - A "community-run catalogue of useful sets of data on the Internet."

Data World - A weekly newsletter of useful/curious datasets

Dryad - a curated resource that makes the data underlying scientific publications discoverable, freely reusable, and citable.

FRED - Economic Data from Federal Reserve Bank of St. Louis

Google Dataset Search - a specialized search engine designed to help researchers discover datasets that are openly available on the web.

Grouplens Datasets - a research lab in the Department of Computer Science and Engineering at the University of Minnesota.

Harvard Dataverse Network - Collection of social science research data.

HealthData.gov - This site is dedicated to making high value health data more accessible to entrepreneurs, researchers, and policy makers in the hopes of better health outcomes for all.

Informatics Research Data Repository - a Japanese data repository that collects data on disciplines within informatics.
IPUMS International - provides individual-level census microdata samples. These data come from Censuses around the world.

Kaggle - Open datasets on everything from government, health, and science to popular games and dating trends.

Apollo - The institutional repository of the University of Cambridge, managed by the Open Research Systems team based in Cambridge University Library.

DASH - The central, open-access institutional repository of research by members of the Harvard community

Oxford University Research Archive - The institutional repository for the University of Oxford.