WowAce

Creates new chats with guild channel functionality

Improved Quest Tracker

Displays online guild mates.

Don't underestimate your little critters!

Simple display and management of Away / AFK / Busy / DND status via broker or minimap

Uses guild notes to add alts' main names to chat windows and other places

Adds your name to chat messages

Shows activity for hidden ChatFrames by making their tabs flash.

Automate Your GDKP Auctions, Bids, & Payouts

It's a doodle pad for doodling with doodles.

DreamChat

vChat

Crowd-control monitor

Filters AFK and DND messages after you've seen them once.

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

Tracks whispers and conversations

FuBar_ChatAlertsFu

Allows customisation of login/logout system messages.

MiniChat

Captures chatframe Tradeskill Links for later reference in an easy to read format