WowAce

Alternate Power- and Combopoint/SoulShard/HolyPower-bar

Shows skills in a tooltip and allows them to be used.

Entropy skins for Masque.

A Collection of Automations and Interface Tweaks.

FuBar_AnkhTimerFu

Display auras on action buttons.

Database of item upgrade IDs

Show item durability and quality in the character frame.

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

View an image of your guild vault from anywhere.

Adirelle's unit frames, based on haste's oUF.

Smart raid loot and DKP tracker with automated standby and learning

Shows simple Buttons for your Cooldowns :)

HUD that you can tweak the way you want.

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

Drop the cheapest thing you're carrying

Adds mob patrol paths to your map.

Manufac

FlexBar2

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