WowAce

A library to help with localization of item types and subtypes.

AddOn development framework

A library to provide information about zones and instances.

A library to provide a markup syntax

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

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

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

A library to provide mobIDs for bosses.

Additional information about player spells.

StatLogicLib

A library allowing for easy creation of graphs

Good old LibTourist-3.0 for WoW Classic Cataclysm

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

A library that handles the basics of "window" style frames

Database of Diminishing return categories and general data

Provides one or many informational windows with optional interactive widgets.

Parses ToC and adds About panel to Interface options

A library to help with localization of Zones.

Dropdown library for Ace3 options, extensible to other options formats. Works ok.

A library to provide a clean dropdown menu interface.