Public Datasets

Big (mostly clean) Datasets

City

Austin, Baltimore, Boston, Cambridge, Chicago Data Portal, Cook County, Edinburgh, London, Melbourne, New York, NYC Open Data, NYC Taxi, Philadelphia, Providence, San Francisco, Seattle, Somerville, Sunshine Coast, Tempe, Toronto,

State

Connecticut Open Data, New York State, Washington DC

Country

Australia, CDC: 500 Cities, CDC: National Center for Health Statistics, Homeland Infrastructure Foundation-Level Data (HIFLD), New Zealand, NOAA Global Time Series, NOAA Paleoclimatology Data, United Kingdom, US Energy Info Admin, US Medicare, US NASA, US Nola

International

CERN

Corporate

Rapid7 Labs, Stack Exchange

Datasets Built into Frameworks

Odd or Interesting (mostly dirty)

Data tools