WowAce

Library that tracks incoming heals

A library to help with localization of factions.

A library to provide unit-oriented tags to LibDogTag-3.0

StatLogicLib

A library to provide a markup syntax

Queing of /who and SendWho() queries and a much better interface (see docs), with gurantee to be executed & callback.

Babble-2.2

A library to help with localization of Zones.

Additional information about player spells.

Static library of wow map data

A library to provide a clean dropdown menu interface.

Database of Diminishing return categories and general data

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

Provides one or many informational windows with optional interactive widgets.

Fires events whenever a raid member "fails."

an embeddable library providing an abstraction layer for tracking and querying Blizzard's Nameplate frames with ease and effi...

Library providing mappings between trade skill recipes, spells and created items

A library to provide mobIDs for bosses.

A library to provide information about zones and instances.

Threat-2.0