WowAce

Lists and/or reminds people missing flasks or food buffs at every ready check.

ChatAssist2Options

CrayonLib

LibGUIFactory-1.0

Displays both Kalecgos and Sathrovarr the Corruptor hit points during the encounter.

XML import library

RaidGroupNumber

A simple addon that warns you if your pet isn't attacking while you're in combat.

Automagically draw your weapons !

Combat Alert

Tells you who bought your auctions.

Library to provide non-explicit cooldown tracking and callbacks.

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

FuBar_ModMenuTuFu

Congratulate people when they ding

Flames anyone who lets his debuff expire on Malygos Phase 3

Automatic ammo reloading and selection, with warnings.

Replacement for WoW's flash/fade functions.

KC_PlayerFramePlus

oUF element for highlighting debuffs that are dispellable by the player