https://frontendmasters.com/ and https://egghead.io/ are both quite cheap & have lots of courses - especially useful if learning a new framework or library that they cover.

Which ones have you taken and would recommend?

I don’t go to conferences very often. I went to TechNet this year in Augusta, GA and it made me wish I were an independent consultant. I am still getting calls and sales opportunities from all these big companies. This was all technology players and the defense industry so it’s a lot of businesses that are either super successful or struggling for establishment in a very small pond. Consider what’s in Augusta: NSA and Army technology.