All datasets listed here are free. List last update was on 2016/12/21
- Awesome public datasets: An awesome list of high-quality open datasets in public domains (on-going). By everyone, for everyone!
- World Bank Open Data: Free and open access to global development data.
- Gapminder: Datasets on world health, economics, population and other indicators of the world.
- Datahub: The Datahub provides free access to many of CKAN's core features, letting you search for data. You can use the web interface or, if you are a programmer needing to connect the Datahub with another app, the CKAN API.
- The Time Series Data Library (TSDL) was created by Rob Hyndman: The Time Series Data Library (TSDL).
- World Health Organization
- European Union Open Data Portal
- Amazon Web Service public datasets
- Facebook Graph
- Google Trends
- Google Finance
- Google Books Ngrams
- Machine Learning Repository