Central Intelligence Agency World Factbook & CIA Factbook entries as JSON files
Common crawl: data scraped from the web for anyone to use
Etymology database
Foreign Ministers in 13 powerful countries since 1789
Historical datasets
Slave trade (historical)
Small datasets of historical interest for statistics development
Nobel laureates
Nobel prize
UFO reporting center (US)
UFO sightings data — National UFO Reporting Center (US)
