WowAce

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.

Manages the scanning of the auction house in a reliable an efficient manner.

Group interrupt cooldown tracking.

PoisonSwapper automatically manages weapon swapping for maximum DPS

Displays info about who rolled Need/Greed/Pass on items that are currently rolled for

Adds a confirmation dialog when crafting Bind-On-Pickup trade skill items

Hotkey interface for spells, macros, other clickables.

Fade Blizzard Raid Frames

Shows you which bosses you've killed next to the raid finder frame.

Show a bar indicating the attack power gained from Vengeance.

BankItemsFu

A Perl layout with oUF.

TickTo

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

MonkeyPirate

Complain about crowd control breaks.

FelwoodFarmer

ClassColors

Debuff Monitor: A Powerful & Configurable Raiding Tool

Customize the appearance of the chat bubbles.