Healing AddonFollow

Hey everyone. There is an addon im looking for, had it on my sham. Its kinda like a theory craft thing where if u go to your char panel u click a tab then it brings up your heals and they're healing/mana cost and u can punch in #s and see how it changes you effective healing. I cant remember name of it but if anyone knows it can u help me out? thanks in advance

I had a similar addon called DrDamage, works really well with theorycraft and sounds like what you are looking for.