Which coding editor is best ?

Answer 1

PhpStorm for PHP
WebStorm for HTML, CSS, Javascript
Visual Studio for C++, C#
Pydev, PyCharm for Python

Answer 2

SublimeText for Web(html5, css3, js)
Qt Creator for C++
Anaconda for python

Answer 3

For text editors for html css and JavaScript ...
1 Notepad++ is great and free for windows.
2 Sublime is great for both windows and mac... but not free.
3 Brackets is also freeware and a great for both windows and mac.