WowAce

A modular, lightweight and screen-estate saving grid of party/raid unit frames

Modular casting bar.

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

Arena unit frames

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

Show item levels in the character frame

A skinning engine for button-based add-ons.

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

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

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

The original source for where things are in Pandaria

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

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

A library to help with localization of in-game subzone names.

Simple Map Mod

Modular damage meter.

Shared handling of alternate identity data between addons.

Replacement for the default UI's StaticPopup dialogs.

Adds a Button to the Worldmap which toggle Handynotes

Provides one or many frames for dumping text into.