WowAce

Makes the default frames moveable via simple drag and drop

Displays information about the current zone on the World Map

Scan for rare mobs so you can find them and their loot

Tracks herbs/ore/items that can be broken into component pieces

Another HUD addon

XP bar using Ace3.

Custom widgets for AceGUI-3.0 and AceConfigDialog-3.0.

A modular, lightweight and screen-estate saving grid of party/raid unit frames

Set and manage character notes that are displayed in unit tooltips and /who results.

A library to provide information about zones and instances.

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your toon or some other units.

Displays additional information for Mythic Keystone dungeons

Chat addon, filtering messages and UI changes

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

Library of data about what items tier tokens can be turned in for

Show the transmog appearance of an item when you mouse over it, and shows collection-status in bags, shops, and elsewhere. Works on transmog, mounts, pets, and decor.

A powerful, comprehensive utilty for displaying graphics and information based on buffs, debuffs, and other triggers.

Afflictions display and cleaning for solo, group and raid with advanced filtering and priority system.

Drop the cheapest thing you're carrying

Tracks Raid/Instance/World Boss lockouts for all your characters, daily/weekly quests, currencies, trade cooldowns, and more!