WowAce

Shared handling of alternate identity data between addons.

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

A framework for chat ehancement modules.

Give whispers an instant messenger feel.

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

Remember where rares were

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

Lightweight Chat Improvements

Blocks Chinese Chat

A friendly companion that remembers the chat.

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

Adds your name to chat messages

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

Redirect character errors, system messages and information messages.

trade history log, recent trade list by Warbaby@163.com

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.

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

Assistace for Blackhand (Mortar warning in P2, custom says for bombs and marks in P3)