WowAce

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

A library to help with localization of Zones.

Additional information about player spells.

Some handy events that should exist in the default UI

Talismonger-3.0

A library to track nameplates.

ItemBonusLib

Good old LibTourist-3.0 for WoW Classic Era

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

A library to get currencies' related information

Database of Diminishing return categories and general data

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

Threat-2.0

A Library for stat conversion, calculation and summarization.

TabletLib

Helper functions used by my addons, feel free to use them in your addon too

A library to help with localization of talent trees.

Library handling communcation for Magic* addons

GUI Configuration Library

HealComm-2.0