Plomp is a HTTP banner grabber script written in Perl that also sends malformed requests to the server in order to determine if the version information has been altered.
You can download it from the following link: https://packetstormsecurity.com/files/download/104569/plomp-banner.txt
Source: https://packetstormsecurity.com/files/104569/Plomp-Banner-Grabber.html