WowAce

MalygosHelper

Tracks specialization and talent data for group members

Adds a third text indicator to Grid.

A Healing Assignment management addon

Hold a key to temporarily center and magnify the Minimap.

Keeps track of important de-/buffs in a splash screen

ChatAssist2

Tool for easy task assignments in raids.

Plays amusing sounds whenever you skin a mob

Provides bang-whispers for your professions.

ColaLight

Makes the Battle Objectives Frame movable

Auto confirms Roll & Loot

Displays a reliable cooldown timer for the Shaman Ascendance ability

Ratings

PiraPlex

Never miss an Brain Freeze, Hot Streak or Missle Barrage proc

A library that tells wether a item is a quest item or not (equipped or in bags)

Hotkey interface for spells, macros, other clickables.

Notifies you when you get aggro.