WowAce

Provides one or many informational windows with optional interactive widgets.

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

Where are the hidden treasures in Battle for Azeroth? Show in HandyNotes

Tracks rare drops, including companions and mounts

Where are the hidden treasures in Legion?

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

Displays the locations of Hallow's End candy buckets.

Remember where rares were

Adds mob patrol paths to your map.

Achievements

Displays the locations of Summer Festival bonfires.

Displays the locations of Garrison music scrolls.

Where the Treasure Hunter objects are in Draenor

Displays the locations of Lunar Festival elders.

Where the Lost and Found objects are

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

Where the lore is at

Teleporters in Suramar? Sure, why not?

Show all the leyline taps in Suramar

Books in Azsuna? Sure, why not?