DNSCheck is a DNS delegation quality checker written in Perl. There is a backend for performing the checks, and a web frontend written in PHP. An online web based version can be found at http://dnscheck.iis.se. A DNSCheck-development mailing list where discussions about development and features take place can be subscribed to here: http://lists.iis.se/mailman/listinfo/dnscheck-dev. Browsing the archive you can do here: http://lists.iis.se/pipermail/dnscheck-dev/