Spamzilla - Spamzilla is a prevailing software for detecting many types of SEO spam automatically.
BIND - BIND is by far the most widely used DNS software on the Internet.
Expired Domains - Information about Expired Domain Names. Check the Availability of thousands of Expired Domains every day before they Drop and after. Just pick what you like!
PowerDNS - PowerDNS offers open source DNS software, services, and support.
Domain Scout - Tools to help you discover great domain names for your projects.
dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.