WowAce

Calculates DKP based on Item Level

Combat Alert

Adds 3 corner indicators to each corner of the Grid frames.

Display the global cooldown around your cursor. (+ other stuff)

Combine

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

Cartographer_Fishing

Keeps track of gold and cash flow across multiple characters

FuBar_CraftTimersFu

What did you just loot?

Eliminates the spam from the chatframe and sums it up in a broker plugin.

AnchorsAway

DarkCandy

ItemRackFu

Keeps track of time played and rested XP across your characters.

HazLoot

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

FuBar_CharmsFu

Sniff

RBM