WowAce

FuBar_CombatTimeFu

Manages tracking of raid attendance, loot, and more.

Cartographer_nnTrainers

Tells you if you're buffed

EUF is an enhance of wow original unit frames, provides hp with both value and %, and optional 3D portrait. Simple and Useful.

Stores a browsable database of spells that mobs cast

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.

Allows you to browse your clients database

Friends & Guild Data Broker plugin.

ColaLight

Augmented Virtual Reality. Draw and add markers in the 3d world.

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Adds talent specialization role status to Grid.

A Library for stat conversion, calculation and summarization.

Reminds you if your flask/elixir and/or Augmentation Rune and/orfood buff is about to expire or has expired

Niagara

Splut

GemCensus inspects people and records which gems they have socketed. Then displays which gems are the most popular.

Ingela's Rapture is a lightweight and highly configurable addon that gives you a cooldown bar for the internal cooldown of Ra...

Sneakily inspect how much gold your mouseover target has made so far.