WowAce

Replacement for the default UI's StaticPopup dialogs.

Library that handles chat output.

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

Parses ToC and adds About panel to Interface options

Simple AceGUI3 dropdown item classes for font/statusbar/sound/etc.

Wowhead Data dump for GatherMate2

Restores access to removed interface options in Legion

Enables multi-line/unlimited-length pasting of text or commands into WoW

Arena unit frames

An intuitive keybindings library.

A library allowing for easy creation of graphs

Another HUD addon

Replacement for ActionButton_Show/HideOverlayGlow APIs

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

Creates and manages secure Action Buttons

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

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

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

Keeps track of group members and keeps an up-to-date cache of their specialization and talents.

Shows the possible loot from the bosses