Interesting Data Sets

• UCI Machine Learning
• CMU StatLib
  
• Kaggle   
  
• enigma.io
  
• Datamob
• UN Data
• Data.gov
• Stats for Change Data
• DataMarket

Statistics and Social Change

• Summary
• DataKind
• Data Science for Social Good
• Stanford Statistics for Social Good
• Stats for Change
  

Open Statistics

• ROpenSci
• PLOS
• Journal of Statistical Software
  
• Rpubs
• OpenProcessing
• Arxiv
• Crantastic