WowAce

A friendly companion that remembers the chat.

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

Give whispers an instant messenger feel.

Show item levels in the character frame

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

Chat addon, filtering messages and UI changes

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

Automatically turns on the combat log for selected instances

Displays friend notes in unit tooltips, at logon, and in /who results.

Manages social information with a focus on main-alt associations.

Set and manage character notes that are displayed in unit tooltips and /who results.

Angry Assignments

Displays additional information for Mythic Keystone dungeons

Another HUD addon

Parses ToC and adds About panel to Interface options

AnyFont

Mutes Annoying Sounds

Bulk mail reception made really easy

Provides a quick display for the LFG Call to Arms

AddOn development framework