WowAce

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

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

Database of item upgrade IDs

Library that handles chat output.

Afflictions display and cleaning for solo, group and raid with advanced filtering and priority system.

Scan for rare mobs so you can find them and their loot

Displays additional information for Mythic Keystone dungeons

Library providing multi-column tooltips.

Postal: Enhanced Mailbox support

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

Tracks rare drops, including companions and mounts

Give whispers an instant messenger feel.

Chat addon, filtering messages and UI changes

Makes the default frames moveable via simple drag and drop

Restores access to removed interface options in Legion

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

Arena unit frames

An intuitive keybindings library.

Replacement for ActionButton_Show/HideOverlayGlow APIs

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