WowAce

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

Give whispers an instant messenger feel.

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!

Shared handling of alternate identity data between addons.

Watches your chat, flagging missplled words, and offering correctly spelled suggestions.

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

Redirect character errors, system messages and information messages.

Lightweight Chat Improvements

A friendly companion that remembers the chat.

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

A blizzard group finder replacement

Configure triggers to send messages to your raid team such as timers, rotations, and health/power based triggers. Raid smarter not harder.

Blocks Chinese Chat

Automate Your GDKP Auctions, Bids, & Payouts

Displays online guild mates.

A Simple World of Warcraft Spam Filter!

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

Says random things in chat when casting any spell or ability. Type "/ss help" for the user's manual.

Displays online friends.