WowAce

Chat addon, filtering messages and UI changes

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

Give whispers an instant messenger feel.

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.

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

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.

Lightweight Chat Improvements

A friendly companion that remembers the chat.

Blocks Chinese Chat

A blizzard group finder replacement

Prat

Automate Your GDKP Auctions, Bids, & Payouts

A Simple World of Warcraft Spam Filter!

Displays online friends.

Displays online guild mates.

Adds your name to chat messages

A Collection of Automations and Interface Tweaks.