WowAce

EasyDKP

Fancy up the ExtraActionButton frame

LibRockComm-1.0

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

Raid loot system.

Automatically sells low quality gray items and selected white items to the vendor.

Open those clams (and other containers)

SliceWatcher

Go quick, or go home!

TextSpy

Clean looking square minimap with many options.

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

A frame designed for each specialization of druid's watching their main power and important buffs/debuffs

Displays info about who rolled Need/Greed/Pass on items that are currently rolled for

Note + rep tracking for players, with guild data sharing.

WeaponRebuff

BigTrouble

fmBuffCheck

BuffProtectorGnome

FuBar_CombatTimeFu