WowAce

Provides shareable notes and other information for your guild, party and raid community.

Helps you automate selling stuff.

Better quest log and tracker

A collection of useful (guild management) tools and utilities for smarter than average bears.

TabletLib

VitalWatch

Alternate Rune Display

adds navigation buttons to Encounter Journal

Allows for easy congratulating when someone earns an achievement.

TrackingBar

Announces interrupts in the chat

FuBar_uFriends

Smooth group roll frames

RaidSpy

Mapster's Minimap brother

FuBar_FarmerFu

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

XArt

A filter tool for blizzards TradeSkillUI

Shows Status Bars that you can drag around and group up for your cooldowns