WowAce

Automates sending/accepting group invites in several different situations.

Makes keyboard bindings for moving the camera

Adds information about the items tokens can purchase and vendor location to tooltip

Adds easier gear switching to FuBar.

CurseBar

A collection management library similar to .NET's System.Linq

Very basic viewport setter

PvP plugin for any DataBroker display.

PowerPoint goodness for your addon

Teknicolor_tab

An Addon to make give stock messages based on location or target.

Notifies your chat frame of who has cast their Toy Train

SummoningBar

RBM_BlackTemple

Mail plugin for any DataBroker display.

Manage your AddOns while logged into the game

Will try to keep track of what a character did last time it was logged in

Provides help for your daily quests.

Mutes Annoying Sounds

RareCaller