This addon dinamically creates a list of minicastbutton for all the spells you need to cast on friendly target.
It's aimed to tank and dps, healers usually have more specific addons, but maybe you can find some use for it even if you are a healer.
For example, assumed you are a druid, AQB will make for you:
a button to cast Rebirth on tank(s)
a button to cast Rebirth on healer(s)
a button to cast Innervate on healer(s)
a button to cast Innervate on yourself
a button to /assist tank(s)
a button to /focus tank(s)

From configuration panel you can disable the spell/action you dont want to see

The new buttons DOES NOT use any standard Blizzard bar.

I must recognize that the idea behind this addon is not mine. I have been inspired by AutoPartyButtons (Author: OrionShock)