Links to some public data sets

• UCI Machine Learning Data Sets
• Kaggle datasets
• Climate & environmental data. NOAA NCEI (formerly NCDC)
• Weather data MesoWest
• World Bank Data
• Sloan Digital Sky Survey Data
• Astronomy Data
• US Census Data
• Hawaii Open Data
• Bureau of Economic Analysis Data
• Sports Data
• Awesome Public Data Sets
• Asia Pacific Data Research Center APDRC
• SOEST Data Sets
• Financial Yahoo
• KDnuggets Data sets
• Satellite images from planet.com
• Image Net