WowAce

Co-ordinated targetless Party and Raid wipe recovery. Evolved

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Manufac

Prat

Collects Herbs, Mines, Gas Clouds and Fishing locations and adds them to the worldmap and minimap

Queing of /who and SendWho() queries and a much better interface (see docs), with gurantee to be executed & callback.

Displays the remaing cooldown of the action you tried to use

Watches your chat, flagging missplled words, and offering correctly spelled suggestions.

OneBag is a replacement for the default game bags that combines all the bags into one frame.

XRS

GrindStatus

Configurable Castbars

Create panels for customizing your UI, sucessor to eePanels

CandyBar style cooldown display

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Auto repair + shows durability.

Redirect character errors, system messages and information messages.

Automated smart raid marking to speed up trash clearing in instance runs

Inspects all members of raid and saves in database, as well as lists people's dkp values

Quest History tracker and shows lists of quests in each category