WowAce

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

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

Give whispers an instant messenger feel.

A framework for chat enhancement modules.

Shared handling of alternate identity data between addons.

Redirect character errors, system messages and information messages.

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

A friendly companion that remembers the chat.

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

Automate Your GDKP Auctions, Bids, & Payouts

Lightweight Chat Improvements

Blocks Chinese Chat

A blizzard group finder replacement

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

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

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

Adds your name to chat messages

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

A Simple World of Warcraft Spam Filter!

Prat