DomainBook.com - The best place on the Internet to buy and sell domain names.
DomainsForFree.com - Find domains that are free if a hosting plan is purchased. You may park a domain, but domains listed may not be up to date.
Home.hm servicing - HOME.HM provides domain registrations within .HM coupled with DNS service and web forward/hosting options.
Internic - Find a registrar to register or buy a domain, check the whois. Site owned and run by the US Department of Commerce.
Network Solutions - Reserve, register, develop your domain here. Tools, services and more. (****)
Oznic.com - Major controller of domains.Check if a domain is available and register it directly. (****)
Register.com - Find out if a domain name is taken or register your domain here.
Registrars.com - Advanced domain search including whois, domain transfers, forwarding, appraisals, library of info, and more. (****)