WowAce

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

Announces Mage Spells in chat.

Pet Theory

Objective Tracker

Angry Boss Reminders helps raiders switch to the proper talents, glyphs, and gear for each boss during a raid.

Automagical macros for each talent tier.

Taggle

Cartographer_Herbalism

Automatically sells low quality gray items and selected white items to the vendor.

TuiRaidTracker

Shows your FuBar addons in your LDB display.

Angry Raid Points Client

A simple interface for unitframe click casting.

DogChow

Displays the time remaining before your (temporary) pet is dismissed.

opens/closes all bags when at merchant (instead of only the backpack)

Sphere

StitchUI

Simple oRA3 Maintank Target Frames, based on oUF

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.