HR's In-Game Collectible Maps and Display Mod
MODImmersive in-game maps to point you to the various collectibles across Nuka-World, Far Harbor, and the Commonwealth.
They're meant to let you track down things you may have missed while adding to the flavor of the world, and since each of them is entirely unique, I tossed a corkboard display you can build in your settlements for good measure.
There's also mods that add locations to your pip boy, but this felt more cheaty to me, and often cluttered the maps in a way that really bothered me after lots of exploration was done.