Complete UI Replacement for Blizzards standard, it is designed to have a default settings for UnitFrames, Skill Bars, but also allow for many popular addons to be plugged in without much issue.
The primary goal is to make interfaces portable from place to place, where when the addon detects the use of another, it knows where to place it. So that any character could give another character This addon and a list of addons to use and it would look the exact same.