__rito__
Here are some past Ask HN threads worth mentioning:

1. "Best Lecture Series": https://news.ycombinator.com/item?id=34591291

2. "Top Coursera Courses": https://news.ycombinator.com/item?id=25245125

3. "Best MOOCs": https://news.ycombinator.com/item?id=16745042

4. "Coursera Courses": https://news.ycombinator.com/item?id=22826722

There are some great recommendations and some of them are among the best MOOCs that I have ever taken.

smoldesu
Not necessarily tech-related, but I consider Ableton's online music classes to be a brilliant gift to the online portion of humanity:

https://learningmusic.ableton.com/

https://learningsynths.ableton.com/

beeburrt
There's cs61a:

https://cs61a.org/

(I'm doing the Denero version: https://cs61a.org/denero.html) If you pass the command-line flag: `--local` you can run the tests without triggering the submission system.

accompanying book:

https://www.composingprograms.com/

The moocs from University of Helsinki are really good. Here's the current Python one:

https://programming-23.mooc.fi/

And there's their web dev course, called Full Stack Open:

https://fullstackopen.com/en/

If learning web dev, you can't go wrong with The Odin Project:

https://www.theodinproject.com/

clockwork-dev
Very fun watching this guy chat about probability.

Statistics 110 Probability: https://projects.iq.harvard.edu/stat110/youtube

And this guy (Erik Demaine) is an absolute gem for introductory algorithms.

Introduction to Algorithms: https://ocw.mit.edu/courses/6-006-introduction-to-algorithms...

paeselhz
Hastie and Tibshirani's class on Statistical Learning is a must for someone that wants to learn about ML. All of the classes are available here (https://www.youtube.com/playlist?list=PLoROMvodv4rOzrYsAxzQy...) and the book recently got a Python version to complement the original R classes.

https://www.statlearning.com/

syndicatedjelly
Dan Grossman’s Programming Language series on Coursera is one of the best courses I’ve taken at any level of education

For guitarists, Paul Davids’ courses through his website are excellent

hostcontroller
I can thoroughly recommend Execute Program [0] by Destroy All Software

[0]: https://www.executeprogram.com/courses

the__alchemist
MitX quantum mechanics series. And intro to Bio. And molecular bio. And, of course, Khan.

A lot of the MitX couses from 2017-2020ish were outstanding.

muzani
edX had some absolutely amazing free courses that still is a part of me. They were really tough though
quickthrower2
FastAI’s course seems good so far
PaulHoule
I like the Python course on HackerRank.
sr.ht