I found this one, you enter a keyword and it searches a few search engines and finds which ones of the results are expired.
Aaron's All Search Engine Expired Domain Finder
Requirements:
- Perl 5
- CGI-BIN Access
- Mod_Rewrite ability on server
Anyone have tried this program or have heard anything about it? Was searching cgi-resources and ran into it so im looking for second and third opinions.
I would also fear using it because some registrars would ban your IP address if it saw a program making that many requests of their whois data.