WowAce

FuBar_AlchemyFu

Guilder brings common guild-raid tasks together in one convenient place.

Should I send that recipe to my alt?

Gathers statistics on certain chance-on-use spells, also known as procs.

WhiteboardNG

Combat log evolved.

IDCard

Easily mail friends, guild members, alts and others

A small checklist for raid (de)buffs and who brings what.

Mapster's Minimap brother

Insanity resource tracker for shadow priests.

Announces Mage Spells in chat.

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

Alternate Rune Display

Suppresses chat messages from damage meters and provides single chat-link damage statistics in a popup.

Keeps track of durability and pops up a dialog to repair when you go to a vendor who can.

Library supporting plug in filters.

Cryolysis 2

Loot Distribution System

HiveMind