WowAce

Collects Herbs, Mines, Gas Clouds and Fishing locations and adds them to the worldmap and minimap

FuBar_HonorFu

Shows simple Buttons for your Cooldowns :)

Smart raid loot and DKP tracker with automated standby and learning

HUD that you can tweak the way you want.

Automated smart raid marking to speed up trash clearing in instance runs

GrindStatus

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Incoming Heals

Drop the cheapest thing you're carrying

Adds mob patrol paths to your map.

Queing of /who and SendWho() queries and a much better interface (see docs), with gurantee to be executed & callback.

Litmus

Cartographer_Treasure

FuBar_VampwatchFu

Detox

MiniPet, Always keep your little companion with you, based on the work of Carra.

Angry Assignments

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

Combination of Titan LootType and Roll - stripped down and cleaned up.