Refactoring Tools?

Are there any refactoring tools in common use (used loosely)? In the old days there was Bicyle Repairman. I see that it’s still available, but doesn’t seem to be strictly aimed at code refactoring.

Recently my program was complicated and I couldn’t understand it.
I just found it while searching github

I don’t know if it’s okay to use this and I don’t use it after all.
The description says that it focuses on refactoring, and there are many stars
I don’t know if it’s common! Sorry if I was wrong