WowAce

Manages tracking of raid attendance, loot, and more.

Database of important locations for HandyNotes

Arcana-LFG is a broker plugin to show looking for group information, including call to arms

Tankalyze

Detox

FuBar_AlchemyFu

A library for PvP and Battlegrounds

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

Heads-up minimap display

Better quest log and tracker

Utility library with shared functions and data for various addons by NeoTron.

Threat-2.0

Loot Distribution System

CombatLog in SimpleCombatlog style

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...

BA3_SpellAbilities

FuBar_PuntFu

Aspect checker addon for Hunters.

pDebuffList

SurgeonGeneral