WowAce

A library to track nameplates.

Fires events whenever a raid member "fails."

Embeddable chat throttling library with traffic shaping and priorities

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

Simple library that handles multiple levels of logging.

Configuration library

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

BanzaiLib

Provides information about the player's bodyguard.

Utility library with shared functions and data for various addons by NeoTron.

TabletLib

Tooltip scanning library.

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

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

Scans your Equipment for cumulative item bonuses and sums them up.

Library to help with querying unit talents.

A Library for stat conversion, calculation and summarization.

A library to help with localization of Archeology dig sites

QR Code builder library

Dropin replacement library for SetBackDrop