WowAce

SinkLib

QR Code builder library

TouristLib

Library to help with querying unit talents.

Saves contents of your guild bank and sends/receives updates over the addon channel

Tooltip scanning library.

Test whether the player can really dispell a buff or debuff, given its talents.

Simple library that handles multiple levels of logging.

SanityItemCache

Library to aid in the classification of Mounts

TipHookerLib

AnchorsAway

Quest information

Manages the scanning of the auction house in a reliable an efficient manner.

Dropin replacement library for SetBackDrop

Library to provide non-explicit cooldown tracking and callbacks.

Manages the SavedVariables of your addon with a layered hierarchy of settings.

Keeps track of healing spells cast by everyone in a group.

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

A fully featured library tracking all ongoing absorb effects