Looks like myBuild / Superstar. But I haven't been using any of those addons for quite a while. If you're looking for such an addon you might even be interested in Overview
We want firing off Dark Exchange in the middle of combat to feel awesome... - The Wrobler
You know you don't have to be here right? - Rich Lambert
Verrätst du mir deinen Beruf? Ich würde auch gerne mal Annahmen dazu schreiben, wie simple die Aufgaben anderer sind. - Kai Schober