WowAce

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XML import library

Show who is targeted by at least one enemy, and the casting progress of the incoming spell.

Try to keep them thar pets wrangled

Status indicator that shows if a unit is hostile (probably mindcontrolled)

AllYouCanEat shows information about the following statistics: beverages, foods, bandage types, potions, elixirs and flasks.

Repairs your items automatically upon visiting a vendor.

MagicMarker_Data

A collection management library similar to .NET's System.Linq

Automatically switches Profiles of addons when changing spec

Shift-clicking on a user name in chat shows a tooltip with their whois information.

A customizable buff/debuff display replacement for the default Blizzard frames (with right click cancelaura support).

Thok Cooldown Rotation

CVarEditor

Automatically accepts and turns in the Holiday "fly around the world" quests.

The ultimate in lazy Ulduar raiding

QuestLongList

Send Messages encoded with the hexadecimal system

All Flight Masters, flight duration and more.

Mutes Annoying Sounds