WowAce

Show a bar indicating the attack power gained from Vengeance.

Aggro Warning System for Parties and Raids.

PoisonSwapper automatically manages weapon swapping for maximum DPS

Shows what stat was reforged in item tooltips.

Very basic viewport setter

LDB port of TimeToDie, showing estimated target life expectancy in an LDB object

pMutilate

Allows raid leaders to view information on raid or guild member equipment information

Makes most default frames movable (mailbox, achievements window etc.)

BigWigs_RazuviousAssistant

Simple enhancements to the mission list.

CleanShot

A creative frame managment library

Relog

Adds Name and Buyout Price sort columns to the auction house.

Alert your friends when you ding, get an achivement, or get phat lewts!

Destruction Warlock priority module for clcInfo -- Maighurl

Spell interrupt aid and announcement addon.

Bits

KivinLootzor