WowAce

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

Simple and clean Death Knight displays

A library to track nameplates.

A Library for stat conversion, calculation and summarization.

Sphere

ItemBonusLib

lern2count adds ABinfo castcounts to spell and actions. It has a builtin reagentcount too.

A library for PvP and Battlegrounds

lugMD

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

Ingela's Rapture is a lightweight and highly configurable addon that gives you a cooldown bar for the internal cooldown of Ra...

Numen

StatStain

Adds talent specialization role status to Grid.

Speeds up triggering actions such as items or spells by triggering them on key/mouse down rather than release

Square Minimap and more

Helps to find other player's alts.

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

Timerbar embeddable library

FuBar_RecapFu