This is a list of MOOCs with their respective URLs. These were all provided by users of Hacker News: Ask HN: What are the best MOOCs you've taken?.
- A Brief History of Humankind, Yuval Noah Harari, YouTube
- Advanced Operating Systems, Georgia Tech, Udacity
- Algorithms, Part I, Princeton University, Coursera
- America's Unwritten Constitution, Akhil Reed Amar, Coursera
- America's Written Constitution, Akhil Reed Amar, Coursera
- Artificial Intelligence, BerkeleyX, edX
- Astrophysics, Australian National University, edX **Paid
- Basic Modeling for Discrete Optimization, Coursera
- Bitcoin and Cryptocurrency Technologies, Arvind Narayanan, Coursera
- Buddhism and Modern Psychology, Robert Wright, Coursera
- Build a Modern Computer from First Principles: From Nand to Tetris, Hebrew University of Jerusalem, Coursera
- Circuits and Electronics, MIT, edX
- Coding the Matrix
- Compilers, Alex Aiken, Stanford
- Computational Probability and Inference, edX
- Computer Networks, David Wetherall, YouTube
- Cryptography I, Dan Boneh, Coursera
- CS50's Introduction to Computer Science, Harvard University, edX
- Databases, Jennifer Widom, Stanford
- Differential Equations in Action, Udacity
- Discrete Optimization, Coursera
- Economics of Money and Banking, Perry G. Mehrling, Coursera
- Essence of Linear Algebra, YouTube
- Ethical Hacking From Scratch, Zaid Sabih, Udemy **Paid
- European Paintings: From Leonardo to Rembrandt to Goya, edX
- Fast.AI
- Financial Markets, Robert Shiller, Coursera
- First Nights - Handel's Messiah and Baroque Oratorio, Thomas Forrest Kelly, edX
- Functional Programming Principles in Scala, Martin Obersky, Coursera
- Human Behavioral Biology, Robert Sapolsky, Stanford
- Influencing People, Coursera
- Introduction to Biology - The Secret of Life, Eric S. Lander, edX
- Introduction to Computer Vision, Georgia Tech, Udacity
- Introduction to Finance, Gautam Kaul, Coursera
- Introduction to Mathematical Thinking, Dr. Keith Devlin, Coursera
- Introduction to Operating Systems, Georgia Tech, Udacity
- Introduction to Probability - The Science of Uncertainty, edX
- Knowledge-Based AI, Georgia Tech, Udacity
- Learning from Data, Yaser Abu-Mostafa, Caltech
- Learning How to Learn, Coursera
- Linear Dynamical Systems, Stephen Boyd, YouTube
- Machine Learning, Andrew Ng, Coursera
- Math, Khan Academy
- Model Thinking, Scott E. Page, Coursera
- Paradigms of Computer Programming - Fundamentals, Peter Van Roy, edX
- Probabilistic Graphical Models, Daphne Koller, Coursera
- Programming Languages, Part A, Dan Grossman, Coursera
- Programming Languages, Part B, Dan Grossman, Coursera
- Programming Languages, Part C, Dan Grossman, Coursera
- Machine Learning, Andrew Ng, Coursera
- Quantum Mechanics and Quantum Computation, Umesh Vazirani, edX **Currently not available
- Reinforcement Learning, Georgia Tech, Udacity
- Robotics, University of Pennsylvania, Coursera
- Roman Architecture, Diana E.E. Kleiner, Coursera
- Russian History: from Lenin to Putin, Peter Kenez, Coursera
- Songwriting, Pat Pattison, Coursera
- Statistical Molecular Thermodynamics, Dr. Christopher J. Cramer, Coursera
- The Analytics Edge, Dimitris Bertsimas, edX
- The Ancient Greeks, Andrew Szegedy-Maszak, Coursera
- The Science of Everyday Thinking, The University of Queensland, edX
- The Theoretical Minimum, Leonard Susskind
- Think Again I: How to Understand Arguments, Duke University, Coursera