WowAce

Give whispers an instant messenger feel.

Show item levels in the character frame

Collects Herbs, Mines, Gas Clouds, Archaeology, Treasure and Fishing locations and adds them to the worldmap and minimap

Myslot is for transferring settings between accounts. Feedback [email protected]

Arena unit frames

Ackis Recipe List is an addon which will scan your trade skills and provide information on how to obtain recipes. It works fo...

Tracks Raid/Instance/World Boss lockouts for all your characters, daily/weekly quests, currencies, trade cooldowns, and more!

Replacement for ActionButton_Show/HideOverlayGlow APIs

The original source for where things are in Pandaria

An intuitive keybindings library.

Creates and manages secure Action Buttons

Allows you to view all items from all your characters on the same account, when-ever and where-ever you want.

Estimated range display. Type /rangedisplay for config

Library to check whether an item is equipable / appropriate for a given class

Another HUD addon

A skinning engine for button-based add-ons.

A library to help with localization of the output of UnitCreatureType.

Shows the possible loot from the bosses

In-game theorycraft. Calculates actual damage/healing based on gear, talents and buffs.

Officially the original source of knowledge of where things are in Draenor during Warlords, in HandyNotes