WowAce

InspectFix

A Replacement for standard UIDropDownMenu

Personal buff monitor - are you buff enough?

Keeps track of your top hits, heals, criticals, etc.

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

Healer gear benchmark

Reduces interface tedium by doing the little things for you.

Displays item durability and repair cost.

Does stuff for sachmo

Shows mana usage as a percentage in a spells tooltip.

Keeps track of space left in your bags.

Adds various hearthing items to AdiBags virtual groups

Provides database of quest giving npcs/mobs/objects for display on the World Map/Minimap

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Library handling communcation for Magic* addons

A library to help with localization of talent trees.

KoS-Management Tool

Tell you where all the daily elite pets are

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

Adds party/raid role icons in useful places