Last updated on 10th Dec 2018
New datasets from recent research papers or recently made available :
1.  ICLR OpenReview 2019 webpages [Link1]
2. FIRE -Forum of Information Retrieval India involving multi-lingual languages [Link]


Some websites to work with datasets :
1. UCI Machine Learning Repository
2. Carnegie Mellon University – Machine Learning Course Projects
Spring 2015
Fall 2010
3. These sites contain lists of datasets along with resources and reading materials available :
Google : Machine Learning Student projects based on Natural Language processing.
5. Email datasets :
7. This blog post give links to many available datasets