Most important part of a research work is data, after all it is this data which formulates the entire research. Finding the most appropriate dataset is fundamental to success of any research, below in the list of few key dataset that can be used for machine learning research purpose

  1. UC Irvine Machine Learning Repository
  2. Open Data Network (Socrata)
  3. Google Trends Datastore
  4. Deep Learning Datasets
  5. Reddit datasets
  6. Pew Research Center Datasets

There are many more  but any of these would a right place to start with. Enjoying making machine learn.  I will keep adding to list as I find more of these.(y)