Have you met HTML + emmet?

Question

You should give it a try. It's a one way ticket to productiveness.

It's a really cool way to write HTML using plain CSS selectors and custom ones too.

Good Luck!

https://docs.emmet.io/

Answer 1

I've used it for a couple of months now, and it's amazing, but there are several preprocessors that are even better IMO

Answer 2

sass, less and jade in my opinion

http://sass-lang.com
http://lesscss.org
http://jade-lang.com

for js i use pure js vanilla or some extra libraries if I really need them (like jQuery, React or angular)
additionally I use node.js for the server and react native for mobile development

Answer 3

Which ones?