WowAce

A helper addon for the achievements "Let It Snow", "Fistful of Love", "Shake Your Bunny-Maker", "Check Your Head", and "Turkey Lurkey"

Replacement for default bags.

Death reports

Displays info about who rolled Need/Greed/Pass on items that are currently rolled for

Makes your item stats shine!

Notifies you of experience gains

FuBar_MonkeyQuestFu

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

Make it easy to explain bosses in Raids.

Hook extra menu to friend list, guild list and chat player

Draws some lovely 3D portraits in the standard Blizzard artwork.

Shows who controls Wintergrasp and the time until the next battle.

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

A Data Broker add-on for quickly switching your specialization with gear set and loot specialization.

For Developers (of Addons which uses LibWho-2.0): show queues and queries in realtime

TouristLib

Relog

Adds item values to chat messages.

Sniff

FuBar_AbramsFu