Lean Domain Search - Find a Great Domain Name w/ twitter handle availability
Whats My DNS - Instantly check your domain names current IP address and DNS record information against multiple name servers located in different parts of the world.
Brandpa - Domain names for startups
ViewDNS.info - Free DNS related tools including Reverse IP Lookup, DNS Propagation Checker, Chinese Firewall Test...
SafeSocial - Make the Internet a better place
CubDomain - CubDomain.com is the site to check website's statistics, Information, Whois Record, Hosting...