WowAce

Makes those pesky garrison animations go away.

HiveMind

FuBar_MiniClockFu

Combat Alert

Fancy up the ExtraActionButton frame

SurgeonGeneral Listen CLient

Provides access to all teleporting spells and items on right click of minimap button.

A library to help with localization of Archaeology artifacts

BigTrouble

ChatHighlighter

Sniff

Building a Better Mailbox

Eliminates the spam from the chatframe and sums it up in a broker plugin.

Automatically invites player from templates.

AltClick an item in your bag to add it a mail, auction, or trade frame, and alt-click to buy a stack if reagents.

Handles the assignment, coordination, and announcement of many parts of the Lich King encounter in Icecrown Citadel.

Tracks whispers and conversations

Augmented Virtual Reality. Draw and add markers in the 3d world.

Adds item values to chat messages.

ItemEnchantApplication