WowAce

Library providing multi-column tooltips.

Postal: Enhanced Mailbox support

Chat addon, filtering messages and UI changes

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

Tracks rare drops, including companions and mounts

Library that handles chat output.

Restores access to removed interface options in Legion

A library allowing for easy creation of graphs

Makes the default frames moveable via simple drag and drop

Displays additional information for Mythic Keystone dungeons

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

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

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

Replacement for the default UI's StaticPopup dialogs.

Modular casting bar.

Database of item upgrade IDs

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

Parses ToC and adds About panel to Interface options

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

Show item levels in the character frame