For holy:
Clique is pretty much a necessity, along with any Raid/party frames that you are comfortable with.
Grid, Pitbull, or
PerfectRaid are all nice, pick one. (I use Grid/Pitbull because of how customizable they are. Pitbull has built-in healing stuff that is really nice.)
PoM Tracker is wonderful.
Wardrobe2 to switch quickly between different gear sets.
That will give you a really good start.