WowAce

Combat Alert

TGuildFrame

PiraPlex

Outdated!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

Right-click on minimap blips to open a targeting menu (out of combat).

Displays online guild mates.

Adds a button to the quest completion interface which allows you to auto equips selected quest Item after completion

Cryolysis

Displays friend notes in unit tooltips, at logon, and in /who results.

TableTopLib

Adds custom effects to your cursor.

EUF is an enhance of wow original unit frames, provides hp with both value and %, and optional 3D portrait. Simple and Useful.

A library to help with localization of Archeology dig sites

ORLIC

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

Library to aid in the classification of Mounts

vChat

Provides quick notification (sound and visual) of your tanking status of your current target. Meant for tanking.

Puts a timer in /yell when you get Unbound Plague during the Heroic Professor Putricide encounter

FuBar_MonkeyQuestFu