Spam User Remover is a WordPress utility plugin focused on cleaning up existing spam registrations rather than only blocking new ones. It exists because real sites sometimes need after-the-fact cleanup, not just preventative controls.
It is a smaller utility project, but it still demonstrates pragmatic plugin work aimed at an operational pain point administrators actually encounter. The value is less about elaborate UI and more about recognizing the difference between prevention and remediation when a site has already been abused.
It is straightforward work, but exactly the sort of operationally useful plugin that often matters more to a site owner than something flashy.