WowAce

Death analysis tool

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

FuBar_VampwatchFu

Raid Frames using the oUF framework.

Shows your standings with the factions.

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

Keeps track of quests.

A library to help with localization of Zones.

Incoming Heals

Open all your mail

Kaliban's Class Loot List Star Display

Mutes various chat related annoyances while in capital cities and instances.

Shows class colors on player nameplates and names

Threat reactive nameplates for TidyPlates.

Tracks vulnerability debuffs on multiple mobs

Toggles WoW to the forground on events.

Provides one or many informational windows with optional interactive widgets.

Barks at you when you target a crowd-controlled unit

FuBar_FarmerFu

Raid loot tracking and text generation