Which code editor you use and which you think is the best ?

Answer 1

I use Notepad++ for web design. A few specific plugins for it makes it simple to handle just about everything. Watch a video about it if you like...

https://youtu.be/oQbCbTg2EfM

Answer 2

Sublime Text 2 (Although there's now a Sublime Text 3).

It's cross-platform. On Mac but want to use it on Windows too? No problem.

https://www.sublimetext.com/3

There is no 'best'. It's subjective, but also based on what you want to achieve.