Reference Explorer is an editor tool that provides a great way to find your assets dependencies and references. A great tool that saves you a lot of time when you want to discard those unreferenced assets or check what assets is an object using.
Features:
Reference Explorer: Finds every object that has a reference to a specific object.
Dependency Explorer:Finds every object that a specific object uses.
Orphan Dependencies: Finds every object that has no references in your project.
Atlas Reference Explorer: Finds every prefab that is using a sprite of an atlas.