WowAce

TableTopLib

Keeps track of resurrection spells cast in a group

QR Code builder library

SinkLib

TouristLib

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

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

A library to help with localization of Archaeology artifacts

Library to aid in the classification of Mounts

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

Quest information

Libary for cleanly inspecting other players

tekKonfig

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

Simple library that handles multiple levels of logging.

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

AbacusLib

A fully featured library tracking all ongoing absorb effects

Library to provide non-explicit cooldown tracking and callbacks.

Tracks specialization and talent data for group members