WowAce

RaidHelper

Helps you decide which ability to use next according to priority you set

A variant of AceGUI's Frame container with an editable input field

Adds options to create customized layouts from within grid.

Bars showing amount of buffstacks

Target assistance by automatic rewriting of macros

Draws some lovely 3D portraits in the standard Blizzard artwork.

FuBar_VoiceFu

Adds Friend and Guild options to the context menu of player units.

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

A helper addon for the achievements "Let It Snow", "Fistful of Love", "Shake Your Bunny-Maker", "Check Your Head", and "Turkey Lurkey"

Considers an item against all the items you have to determine whether or not it is an upgrade

Automatically switches Profiles of addons when changing spec

Retooled Professions

Remaining and rested XP Data Broker plugin.

AllYouCanEat shows information about the following statistics: beverages, foods, bandage types, potions, elixirs and flasks.

Options for TinyTip

Adds indicators to the sides of Grid frames.

ArenaPointer

NShakedown