WowAce

Raid Frames using the oUF framework.

MorgDKP

Regain that wasted space!

A replacement tradeskill window

Fires events whenever a raid member "fails."

Tracks the HoTs you cast.

XRS

provides enchanters with a decent tool for managing their profession

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

Keeps track of your current location.

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

Displays the locations of the chests for the Treasure, Treasure Everywhere achievement

Angry Raid Points

A replacement tradeskill window for Classic

Database sharing module for GatherMate2

Barks at you when you target a crowd-controlled unit

A library to provide mobIDs for bosses.

Test whether the player can really dispell a buff or debuff, given its talents.

Creates simple table controls for tabular text data.

Database of Trainer locations for HandyNotes