WowAce

Profiler of the Lords of the Zodiac guild.

Fires events whenever a raid member "fails".

Display the global cooldown around your cursor. (+ other stuff)

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.

Quest helping: fetching items to use, that sort of thing.

EasyTrack

FuBar_KillMeterFu

CombatAnnounce

Adds the toon name to the alert that your RealID friend has come online.

A threat main view module for Recount

Calculates DKP based on Item Level

BuffProtectorGnome

Meeuuuh

Displays the zone level ranage of the zone you are in and also gives you a suggest zone and instances to be in.

WQA helps you find world quest groups easily. Works after the 4/28 group finder changes.

Timerbar embeddable library

fmBuffCheck

SwapMagic

Fixes UI bugs

Shows class colors on player nameplates and names