When I last mentioned Academic Torrents, in early 2014, it had 1.67TB of research data.
I dropped by Academic Torrents this week to find it now has 25.53TB of research data!
Some arbitrary highlights:
Richard Feynman’s Lectures on Physics (The Messenger Lectures)
A collection of sport activity datasets for data analysis and data mining 2017a
[Coursera] Machine Learning (Stanford University) (ml)
UC Berkeley Computer Science Courses (Full Collection)
[Coursera] Mining Massive Datasets (Stanford University) (mmds)
Your arbitrary highlights are probably different than mine so visit Academic Torrents to see what data captures your eye.
Enjoy!