Nobody can have a favorite application.
My favorite Word Processor (WordPerfect) cannot create software and my favorite applicaiton development application (Visual Basic) cannot do word processing.
For general-purpose file management, my favorite is Ztree, a Windows version of a DOS program. It cannot replace Windows Explorer, but is far superior for various file management.
And so it goes. A modern PC can do so much that many of us have at least half a dozen favorite applications.