WowAce

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

Chat addon, filtering messages and UI changes

Give whispers an instant messenger feel.

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

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

Shared handling of alternate identity data between addons.

A friendly companion that remembers the chat.

Redirect character errors, system messages and information messages.

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

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

Blocks Chinese Chat

A blizzard group finder replacement

Lightweight Chat Improvements

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

Prat

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.

Mutes various chat related annoyances while in capital cities and instances.

Displays online guild mates.

Plays sound when a ready check, LFG queue, battleground queue, or world battleground queue pops even if you have sounds turne...