WowAce

oUF layout looking like ag_Unitframes and Grid.

Automatically select the most expensive quest reward.

Automatic switching to FFA loot for Mimiron phase 3

BigWigs_ThaddiusArrows

LibMindReader

Adds a /rl command to reload the UI

Was based on rswapper by Muradin, original idea by m0rfin

A texture browser for developers and UI modders

Praise the Sun! \[T]/

Shortens gold output in your chatframes by using the icons instead of names.

Notifies your chat frame of who has cast their Toy Train

A library to provide a way to easily create controls for Blizzard's options system

Tells your party members when you interrupt stuff, or fail to do so.

Adds an inobtrusive circular castbar around the mousecursor, handy for Clique users

Broker object for oQueue.

PimpMyProfession The Profession Guide

Manage your AddOns while logged into the game

Track friends / enemies in a convienent window, with optional logging

Data Broker plugin showing your pitch and speed.

MiniType