WowAce

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

Shows skills in a tooltip and allows them to be used.

Nihilum Raid Tracker, originally written for the EU guild Nihilum.

Suppresses chat messages from damage meters and provides single chat-link damage statistics in a popup.

Good old LibTourist-3.0 for WoW Classic Era

Shows mana usage as a percentage in a spells tooltip.

Talismonger-3.0

Kaliban's Class Loot List Star Display

Shows the mirco menu and game menu in a clickable broker tooltip.

Adds party/raid role icons in useful places

Displays how many times you have jumped.

View an image of your guild vault from anywhere.

A data broker display, that shows one block per plugin.

TabletLib

Some handy events that should exist in the default UI

Replacement for default Rune Frame and more.

Cartographer_QuestObjectives

Show all the orbs for triggering Kosumoth

WhoDrop

Database of Vendor locations for HandyNotes