WowAce

Shows skills in a tooltip and allow them to be used. Also keeps track of Cooldowns.

Displays classes and specialisation dependent stat priorities provided by icy-veins.com

Automates bites during the Blood-Queen Lana'thel encounter in Icecrown Citadel

Tracks interrupts

Give logical progression of Mining, Herbalism & Skinning. Will not be updated with WoD zones

Shows the minimum durability of equipped items on the stats frame.

A library to track nameplates.

Detects specific CDs and spellcasts

Nihilum Raid Tracker, originally written for the EU guild Nihilum.

Shows mana usage as a percentage in a spells tooltip.

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

DarkCandy

Allows tradeskill usage by clicking items or reagents.

Shows Status Bars that you can drag around and group up for your cooldowns

Highly-configurable shield / absorb tracker.

MendWatch

Review any raid or party members recent incoming combat along with health level.

Sniff

Henge

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