WowAce

An auction house AddOn to make the life of each fence easier.

WhoDrop

A Simple World of Warcraft Spam Filter!

Barks at you when you target a crowd-controlled unit

XRS

Load manager for AddOns

Shows ZoneInfo on the World Map in a perfectly cromulent fashion.

Mutes various chat related annoyances while in capital cities and instances.

Keeps track of durability and pops up a dialog to repair when you go to a vendor who can.

manipulate the minimap in numerous ways; move, scale, skin.

Tracks the current Fear Ward's in the raid or party.

Plays sound when a ready check, LFG queue, battleground queue, or world battleground queue pops even if you have sounds turne...

Open those pesky lockboxes

A library to help with localization of Zones.

Cartographer_Treasure

Healer gear benchmark

Keeps track of performance of memory, latency, and framerate.

MiniPet, Always keep your little companion with you, based on the work of Carra.

Shows mana usage as a percentage in a spells tooltip.

FuBar_WindFuryFu