WowAce

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

Tracks rare drops, including companions and mounts

Where are the hidden treasures in Legion?

Adds mob patrol paths to your map.

Provides one or many informational windows with optional interactive widgets.

Where the Treasure Hunter objects are in Draenor

Remember where rares were

Teleporters in Suramar? Sure, why not?

Tracks raid/instance/worldboss lockouts for all your characters, daily/weekly quests, currencies, trade cooldowns, and more!

Displays the locations of Summer Festival bonfires.

Displays the locations of the chests for the Treasure, Treasure Everywhere achievement

Show all the leyline taps in Suramar

Where the Lost and Found objects are

Where the lore is at

Achievements

Displays the locations of Lunar Festival elders.

Show where the chests are for Withered Army Training

Displays the locations of Garrison music scrolls.

Displays the locations of Hallow's End candy buckets.

Books in Azsuna? Sure, why not?