WowAce

Keeps track of time played and rested XP across your characters.

GonffBar

Auto roll greed, need, pass or manually roll on items.

Instant SLAM! notification

Volume control panel.

Manages tracking of raid attendance, loot, and more.

Library handling communcation for Magic* addons

Some handy events that should exist in the default UI

Allows you to browse your clients database

A customizable view of friends and guildmates.

MainAssist

HiveMind

JasonQuest

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...

Open all your mail

FuBar_PuntFu

TouristLib

Aspect checker addon for Hunters.

A library to help with localization of talent trees.

Cartographer_QuestObjectives