WowAce

LFD status via a DataBroker display rather than the minimap.

Adds aura indicators to unit frames

FuBar_AssistFu

Allows for easy congratulating when someone earns an achievement.

Allows you to loot BoP items without prompting when not in a group or raid

Simple money display for LDB

FuBar_SpeedFu

Provides extended aura status settings.

Powerleveling guide framework

PricePer

Debuff Monitor: A Powerful & Configurable Raiding Tool

Displays oRA3 main tanks.

Never forget which one in that 5-mob pull casts what spell again.

Reverse Engineering will drill down and search your tradeskills for their elements

A seperate focus bar, with focus gain prediction and rotation forecast.

Deformat

A module that lets you find out what today's dailies are without having to visit the quest givers.

WeaponRebuff

This addon helps with daily quests.

SeeingRed