WowAce

Library to provide non-explicit cooldown tracking and callbacks.

A library that tells wether a item is a quest item or not (equipped or in bags)

Embeddable library to track raid/party roster

Shared handling of media data (fonts, sounds, textures, ...) between addons.

LibRockLocale-1.0

Provides a library for accessing auction data and pricing from various Auction Data mods

Library for tracking mouse gestures

LibAvionAddin-1.0

TEALib

LibRockConsole-1.0

CompostLib

LibAvion-2.0

Replacement for WoW's flash/fade functions.

A library that maintains a cache of items and their types.

Standalone LibUnitID, with runtime diagnostic utilities

A library to provide tools for formatting money and time.

LibRockEvent-1.0

Provides accurate, millisecond-level timing.

A library to try to guess a level of a player.

A library to provide a way to easily create controls for Blizzard's options system