It is straightforward plugin for Sublime Text to add or remove "debugger" statement. It can be useful for ruby and javascript developers.
Use shortcut (⌘+⇧+d) to toggle debugger statement. I know that this shortcut is using for line duplication, but I dont use it:) Change this hotkey in plugin settings if you want. You can also use command "SimplestDebugger: Toggle" from command palette, but really, typing "debugger" in your code is quickly.
Install Simplest Debugger from package control.
Or fetch from github:
git clone git://github.com/KELiON/SimplestDebugger.git
and place it in your packages directory.