- USGS Earth Explorer: 40 years of Landsat data and much, much more
- European Space Agency: Sentinel-2: Data and imagery from the European Commission’s Copernicus programme
- NASA's Reverb Data Hub: Aqua, Terra, Aura, TRMM, Calipso, NASA DC, JASON, ENVISAT, ALOS, METEOSAT, GOES, ICESAT, GMS, Landsat, NIMBUS, SMAP, RADARSAT, NOAA satellites, GPS satellites, and more...
- AWS Public Data Sets: Landsat, Sentinel-2, MODIS, Terrain Tiles, and more
- More sources here: Go crazy.
- Planet Explorer: Browse satellite imagery captured over time, all around the world
- Open California: All of Planet's California imagery available for free under a CC BY-SA 4.0 license
- Planet Emergency Response: Planet supports the International Charter for Space and Major Disasters and makes imagery available directly to the public, volunteers, humanitarian organizations, and other coordinating bodies
- Planet Ambassadors: Apply for access to Planet’s data for non-commercial research purposes
- Planet Open Amazon Data / Kaggle competition: Use satellite data to track the human footprint in the Amazon rainforest
- Digital Globe Open Data Program