WowAce

Tracks rare drops, including companions and mounts

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

Officially the original source for where things are in the Broken Isles, in HandyNotes

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

The original HandyNotes source for where things are in Battle for Azeroth

Uses various methods to scan your surroundings for rare or specified NPCs.

Achievements

Show the appearance of an item when you mouse over it

tracks and share quests between your party

QuestLog

Provides one or many informational windows with optional interactive widgets.

Adds mob patrol paths to your map.

Marks the locations of Midsummer Fire Festival bonfires on the worldmap and minimap.

Marks the locations of Hallow's End candy buckets on the worldmap and minimap.

Displays the locations of Lunar Festival elders.

Display Garrison missons for all Characters

Teleporters in Suramar? Sure, why not?

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...

Provides database of quest giving npcs/mobs/objects for display on the World Map/Minimap

Displays an alert whenever you loot an item for the first time.