Given some programming language, editing a file for that language in Emacs generally leads to some nicer behavior with regards to indenting. Emacs will automatically indent to the correct level when you hit RET. That's a fairly common feature. In addition, when you hit TAB on a line in Emacs, it will automatically indent to the correct level, and if the line is already indented correctly, do nothing.
Is it possible to get the second behavior in either Atom or Sublime? Responses for other editors, welcome, too.
There is an emacs-mode in every 'important' text-editor. Take it, customize it and you'll have the emacs-features you want.
For example, in atom you can take the emacs-mode. In SublimeText : sublemacspro.
Even in brackets : brackets-emacs !