WowAce

Provide plenty of links

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

A Friend-Enemy-Unit-Frame for battlegrounds.

LibItemInfo-1.0

Allows the user to preview and track their progress in the collection of various transmogrification appearance sets

ClosetGnome_Switcher

Onyx skins for Masque.

Provides quick access to information on your group and their equipment, enchant and gem choices.

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

provides enchanters with a decent tool for managing their profession

Keeps track of performance of memory, latency, and framerate.

PvE Status Frames

Enhancer

Cleans up minimap buttons and makes them accessible through a pop out menu!

Angry Raid Points

Keeps track of space left in your bags.

Tracks the current Fear Ward's in the raid or party.

Display Garrison missons for all Characters

Does stuff for sachmo

A library to help with localization of Zones.