WowAce

Library providing multi-column tooltips.

Scan for rare mobs so you can find them and their loot

Library providing mouse-click support for LibQTip-1.0.

Show the appearance of an item when you mouse over it

A fancy LDB reputation display, show faction reputation and reputation change history

Set and manage character notes that are displayed in unit tooltips and /who results.

Item stat breakdown, analysis and comparison

Collectinator is an addon which will scan your pets and mounts and provide information on how to obtain them.

Complete tradeskill information.

Lightweight but powerful auction house interface

Manages social information with a focus on main-alt associations.

Kaliban's Class Loot List Star Display

Simple and super light-weight tracking of profession links for all your alts.

Adds various information based on PeriodicTable to item tooltips.

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

Shows mana usage as a percentage in a spells tooltip.

Dynamic item DKP calculation

Interacts with TinyTip modules, either integrated or standalone, to provide extra centralized functionality. Required for an ...

Shows where the equipment of inspected users or yourself is from.

Displays item durability and repair cost.