Having recount set on DPS as a healer helps me prioritize healing. Tanks first obviously, but if youre #12 on the meter and down by several percent, im probably not gonna be bouncing chain heals off you after a pungent blight or decimate. Not saying i wont heal that person, ill probably throw a riptide on em and if theyre low theyll be catching chain heal jumps anyway, but theyre lower on my priority list to keep alive.

I use Skada. When in combat it shows threat, when out of combat I can take a look at the damage meters.

Cyno01 - You are so right!
I would also like to add, that before Combat Rezzing someone who is DPS, I always look at Recount. If he did like 3k damage, I will keep my combat rez in case someone important dies. If he was like top DPS, he will sure get a CR in that instant.

Its nice to know that if I get unchained magic a few times, I won't get healed
Or if I don't get bitten on BQL.
Or if I get assigned to orbs
Or if I get the debuff and take it to the OT as opposed to the guy who waits for the OT to come to him
Or if I don't move on festergut and have a healer PS me
Or if I get unbound plague, or focus'd by the red ooze
Or if MC'd
Or bone spiked.
Or swallowed up my frost mourne.