WowAce

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

Arena unit frames

Officially the original source for where things are in the Broken Isles, in HandyNotes

The original HandyNotes source for where things are in Battle for Azeroth

Replacement for ActionButton_Show/HideOverlayGlow APIs

Give whispers an instant messenger feel.

An intuitive keybindings library.

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

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

Creates and manages secure Action Buttons

A skinning engine for button-based add-ons.

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

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

Provides one or many frames for dumping text into.

Shared handling of alternate identity data between addons.

Another HUD addon

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

A library to help with localization of races.

"Debug" code free since '93!

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