- OpenWeatherMap
- NYTimes
- The Guardian – http://www.theguardian.com/open-platform
- Flickr – https://www.flickr.com/services/api/
- MTA – http://web.mta.info/developers/developer-data-terms.html#data
- Foursquare – https://developer.foursquare.com/
- Sunlight Foundation – http://sunlightfoundation.com/api/
- http://en.wikipedia.org/wiki/List_of_open_APIs
- https://gist.github.com/afeld/4952991
- https://github.com/public-apis/public-apis
- NYC Open Data: data on NYC trees, taxis, subway, citibike, 311 calls, land lot use, etc.
- data.gov: everything from hourly precipitation, fruit & vegetable prices, crime reports, to electricity usage.
- Dataset Search by Google Research: indexes public open datasets.
- Stanford Open Policing Dataset
- Physician Medicare Data
- Civil Rights Data Collection
- Yelp Open Dataset
- U.S. Census Bureau: use their Discovery Tool
- US Health Data: central searchable repository of US health data (Center for Disease Control and National Center for Health Statistics), e.g. surveys on pregnancy, cause of death, health care access, obesity, etc.
- International Monetary Fund
- World Bank
- IPUMS.org: Integrated Census & Survey Data from around the World
- Federal Elections Commission: Campaign Finance & Expenditures
- Stanford Mass Shootings in America Project: data up to 2016, with pointers to alternatives
- USGS Earthquake Catalog
- Federal Aviation Administration
- FiveThirtyEight Data: Datasets and code behind fivethirtyeight.com
- ProPublica Data Store: datasets collected by ProPublica or obtained via FOIA requests, e.g. Chicago parking ticket data
- Machine Learning Repository – large variety of maintained data sets
- Socrata Open Data
- 17 places to find datasets for data science projects
- Awesome Public Datasets (github): topic-centric list of high-quality open datasets in public domains
- Open Syllabus: 6,059,459 syllabi
