WowAce

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

Adds two icon indicators to each corner (total: 8 icon indicators).

Reduces interface tedium by doing the little things for you.

Instant PROC notification

A Mount and Companion manager

Raid Frames using the oUF framework.

Library to help with querying unit talents.

Automatically generate and announce optimal spirit totem assignments during the Gara'jal encounter in Mogu'shan Vaults.

A library to get currencies' related information

A superior broker/LDB display for users of the Recount damage-meter.

KillingSpree

Fixes strata bugs in UI windows

FuBar_BongosFu

Provides data about all artifacts in the player's possession.

A fountain of fonts for your funktastic UI.

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

A clone of the FailBot mod. Announces raid member failures such as "Player1 fails at frogger"

FuBar_uGuild

WhoDrop

Creates virtual cyphered chat channels over guild addon communication channel.