WowAce

FuBar_uGuild

Enables the filtering of items when you visit a vendor

Loot management tool

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

Shows your standings with the factions.

Reminds you if your flask/elixir and/or Augmentation Rune and/orfood buff is about to expire or has expired

Heads Up Display with Player and Target Info

Client for allowing the raid leader to gauge interest on items in a method similar to a ready-check.

Automate Your GDKP Auctions, Bids, & Payouts

XP and Reputation bars

A library to help with localization of Archeology dig sites

Tracks profession specific cooldowns and items across all your characters

MobHealth

Scans your Equipment for cumulative item bonuses and sums them up.

Sets the DND flag, when are in combat.

Highly-configurable shield / absorb tracker.

StitchUI

Collects, analyzes and presents information about the virtual economy.

Priority 3 loot announce addon

Hook extra menu to friend list, guild list and chat player