WowAce

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Status indicator that shows the remaining of value of Powerword shield.

Healer gear benchmark

A Data Broker add-on for quickly switching your specialization with gear set and loot specialization.

Checks your gear before bosses and yells at you if you're an idiot

Rebuff yourself with the mousewheel.

Map and mini-map class colors with combat indicator

Show a bar indicating the unit's Burning Embers count.

SacredBuff

Cryolysis 2

Tankadin

Helps you decide which ability to use next according to priority you set

Cryolysis

Announces interrupts in the chat

Tracks skill and tradeskill costs and progressions, as well as trainer locations.

Instant PROC notification

Displays your soulshards in better way.

GotWood

A shaman mod

CharScanner scans Basic Character Data, Talent Specifications, Equipment, PvE/PvP Achievements, PvE Boss Kill Statistics and ...