WowAce

Reduces interface tedium by doing the little things for you.

DKP system for all guilds in the Banana Republic.

Outdated! Please use 'XLoot', available on Curse and WoWI

Heads Up Display with Player and Target Info

Set the clicking action for Grid buttons

Options for TinyTip

Prospecting and Disenchanting Aide

Tracks profession specific cooldowns and items across all your characters

wRlog

Calculates incoming damage avoidance and mitigation

Library supporting plug in filters.

Suppresses chat messages from damage meters and provides single chat-link damage statistics in a popup.

Various libraries based on LCD4Linux, offering users lower-level UI customizations.

FuBar_uFriends

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

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

Wardrobe2

Pet Theory

Communicates with guild members for their positions on the world map

Ingela's Rapture is a lightweight and highly configurable addon that gives you a cooldown bar for the internal cooldown of Ra...