Whois-Scanner

Whois-Scanner is a free and simple Perl script which helps you keep an eye on domains you consider to buy. You can run it from cron to monitor an unlimited list of domains and the script will send you a message as soon as one of the domains becomes available. No longer do you need to check for expired domains manually, just tell the scipts in which domains you're interested in and automatically get notified by email the same day the domain becomes available again. Requires mailing list subscription for free download.