This is my small collection of various useful websites (at least I feel like it).
It is neither complete nor guaranteed to be correct! And I am relatively a novice in this field...
I do plan to build my own compendium in the near future, so fingers crossed 🤞
A highly recommended site for Potential Graduate applicants: http://csrankings.org/advice.html
Infinite wisdom (according to me) --> NPTEL
An excellent tutorial on Kalman filtering: https://www.kalmanfilter.net/default.aspx
One of the best books on Kalman filtering: Click here
A great website focused on electronics and signal processing: Click here