WowAce

A helper addon for the achievements "Let It Snow", "Fistful of Love", "Shake Your Bunny-Maker", "Check Your Head", and "Turkey Lurkey"

Display combo points for Arcane Blast debuffs

Keeps an eye on someone's distance from you, and alerts you if they get too far.

Notifies you when you get aggro.

Adds icons to the configuration menu for all standard Grid indicators.

PowerDisplay

Simple and rich Death Knight rune customizations

Helps you see the Halion's Corporeality during phase 3

TunnelVision

Shows an arrow to your bite victim during the Blood-Queen Lana'thel encounter in Icecrown Citadel (your raid leader must be r...

Action button layout and configuration

View all your Auctions on any DataBroker display.

LDB display for Oak Interrupts Broker

Never forget which one in that 5-mob pull casts what spell again.

Seraphim Raid Tracker

Cartographer_ExtractGas

MAcon

Provides data about all artifacts in the player's possession.

Provides training reminders to help decipher the Blizzard Spell Alerts.

Adds custom layouts for Grid