WowAce

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

Cartographer_Treasure

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

IncomingHealsLib

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

MiniPet, Always keep your little companion with you, based on the work of Carra.

A replacement tradeskill window for Classic

Regain that wasted space!

Friends list improvements: notes, remembering the information of offline friends, friend list syncing and backups, and a fuba...

Angry Assignments

BuffMe

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

Cryolysis 2

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

Provides access to all Portal and Teleport spells on right click of one button.

Marks the locations of Hallow's End candy buckets on the worldmap and minimap.

Library providing mappings between trade skill recipes, spells and created items

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

cyCircled

FuBar_HonorFu