WowAce

Makes the default frames moveable via simple drag and drop

A bin for all your LibDataBroker buttons

Filters AFK and DND messages after you've seen them once.

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

Another HUD addon

Bulk mail sending made really easy

Remember locations that city guards direct you to for HandyNotes

HereBeDragons is a data API for the World of Warcraft mapping system

Drop the cheapest thing you're carrying

Modular damage meter.

Open all your mail

Grabs bugs for the bug sack.

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.

Should I send that recipe to my alt?

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

Displays additional information for Mythic Keystone dungeons

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

Changes the look of the default UI

Collects Herbs, Mines, Gas Clouds, Archaeology, Treasure and Fishing locations and adds them to the worldmap and minimap

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