WowAce

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

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

Display aura information inside action buttons

Antagonist

Show where the chests are for Withered Army Training

Co-ordinated targetless Party and Raid wipe recovery. Evolved

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

Database of Vendor locations for HandyNotes

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

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

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

Raid Frames using the oUF framework.

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

Angry Assignments

MorgDKP

Set and manage character notes that are displayed in unit tooltips and /who results.

Regain that wasted space!

A replacement tradeskill window

provides enchanters with a decent tool for managing their profession

Keeps track of your current location.