WowAce

AuctionSort

Makes those pesky garrison animations go away.

WoWonid

TrainingWheels

Dropin replacement library for SetBackDrop

Customize the appearance of the chat bubbles.

Hitman

Records mail when visiting the mailbox to make keeping track of mail and expiration dates easy.

Spyglass

Filters unimportant Buffs.

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

Handles the assignment, coordination, and announcement of many parts of the Lich King encounter in Icecrown Citadel.

GCInfo

Shows a frame to track your debuff on Malygos in phase three.

Emerge@Durotan-EU Raid Tracker

Customizing your buff display

ClosetGnome_Switcher

Adds Friend and Guild options to the context menu of player units.

Hotkey interface for spells, macros, other clickables.

KC_PlayerFramePlus