WowAce

Reports in raid chat whenever a raid member "fails." /EnsidiaFails to configure.

Open those pesky lockboxes

Cirque Skins for Masque

A fancy LDB reputation display, show faction reputation and reputation change history

Detox

Shows mana usage as a percentage in a spells tooltip.

Cartographer_Treasure

Angry Assignments

Apathy skin for Masque.

Monitors for friendly deaths and announces them as in Myth: The Fallen Lords

FuBar_ItemListFu

Necronomicon2

Library providing mappings between trade skill recipes, spells and created items

Adds a button to undress the model in the Dressing room.

Keeps track of your reagents for buffing.

Onyx skins for Masque.

Shows your standings with the factions.

Smart mount randomization on a button! Empty coconut halves not included.

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

Various libraries based on LCD4Linux, offering users lower-level UI customizations.