WowAce

Library providing multi-column tooltips.

Remember where rares were

Library providing mouse-click support for LibQTip-1.0.

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

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

Item stat breakdown, analysis and comparison

Show the appearance of an item when you mouse over it

Kaliban's Class Loot List Star Display

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

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

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

Adds various information based on PeriodicTable to item tooltips.

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

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

Displays item durability and repair cost.

Add-on that shows in a unit tooltip window a number of killed mobs of the same kind

A set of datatexts for ElvUI that provide you with detailed info about your professions

How many quests do you have in your log? ;)