WowAce

Displays Instance Maps

Violation

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

Quest History tracker and shows lists of quests in each category

Co-ordinated targetless Party and Raid wipe recovery. Evolved

Allows the user to preview and track their progress in the collection of various transmogrification appearance sets

Visualises healing.

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

Adds World Quests to the quest list

A library to help with localization of in-game subzone names.

Shows simple Buttons for your Cooldowns :)

A replacement tradeskill window

manipulate the minimap in numerous ways; move, scale, skin.

an embeddable library providing an abstraction layer for tracking and querying Blizzard's Nameplate frames with ease and effi...

Show where the chests are for Withered Army Training

Database of Vendor locations for HandyNotes

MorgDKP

View bank, inventory, mail, equipped and guild bank contents from any character anywhere!

Displays online guild mates.

A replacement tradeskill window for Classic