GuideGuide is a plugin that lets you quickly and easily create grids and manipulate guides, wherever you like to work. Whether you're into basic grids or a design pervert that gets weird with the golden ratio, GuideGuide supports your life choices.
Iβve used GuideGuide for half of my (illustrious) career at this point. Itβs really the only plugin I use in Photoshop and Illustrator and iβm excited to know if I ever have the misfortune of having to learn yet another Adobe tool, GuideGuide will be there.