WowAce

View any characters bank and bags from anywhere. Stores items in Baggins submenu "Anywhere Bags."

Tells you which blob to kill at the Yor'sahj encounter in Dragon Soul.

Seraphim Raid Tracker

FuBar_MiniClockFu

XP and Reputation bars

RapidCast

Talented_Data

Shared handling of media data (fonts, sounds, textures, ...) between addons.

lugMD

Visual Raid Cooldown Tracking

Lexan

Simple library that handles multiple levels of logging.

TrainingWheels

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

Adds two icon indicators to each corner (total: 8 icon indicators).

Buff reminders and more

Quickly assign the highest follower to each building or unassign all of them.

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

Saves who searches in a favorites list.

Makes those pesky garrison animations go away.