Is there an AddOn to quickly swap active skills?

[Gobelyn]

Hey. Is there an AddOn that would allow me to quickly swap skills? While the character was not in combat, of course. I keep changing my 5th slotted skill between an attack skill, fast movement, and soul trap. It would be nicer to do that with a key bind or UI button. Is this even possible with an AddOn? There was a Fast Mount AddOn that swapped a slotted skill with fast move, but that one did not work for me at all. I want to do this swap when mounted or unmounted.