A package for Atom to replicate the effects from codeinthedark/editor. Available through the Atom package installer (https://atom.io/packages/activate-power-mode).
Activate with Ctrl-Alt-O or through the command panel with Activate Power Mode: Toggle. Use the command again to deactivate.
For a list of power mode packages to other editors, check out codeinthedark/awesome-power-mode.