123-reg Domain Name Registration
It's never been easier or cheaper to have your own domain name! 123-reg delivers a totally automated service with the lowest prices in the World. 123-reg.co.uk has the best value domain names on the Internet. You will not find a cheaper or more convenient way of buying and managing your domain names. UK domain names are an incredible 9p per year and US domain names are just 39p per year.
123reg.co.uk/

au Domain Administration Ltd (auDA)
auDA is the Australian Domain Name Authority.
auda.org.au/

Cheap Domain Name Register
An affordable place to register domain names, create a website, obtain hosting services, email accounts, search engine submission tools, secure ssl certificates, and web surfing protection in a timely and professional manner.
cheapdomainnameregister.com

Discount Domains Uk
Discount Domains offers a full selection of domain names
discountdomainsuk.com/

EURid
EURid is the not-for-profit organisation, established in Belgium, and has been selected by the European Commission to operate the new .eu top level domain. EURid was established in a partnership between DNS BE, IIT CNR and NIC SE, operators of the country-code top level domain registries for Belgium (.be), Italy (.it) and Sweden (.se). EURid is in the process of setting up offices in those countries as well as in the Czech Republic to support 4 geographical regions.
eurid.eu/

Go Daddy
Go Daddy ranked #1 among all registrars in net new domain name registrations for the years 2002 and 2003.
godaddy.com

Nominet
Nominet UK is the registry for .uk internet names. We manage the authoritative database of .uk domain name registrations. We are a not-for-profit company and have members instead of shareholders. Nominet is officially recognised as the .uk domain name registry by the internet industry, users and the UK Government. We do not proactively sell domain name registrations, but provide neutral advice on registering and maintaining your name.
nominet.org.uk/

Verisign
VeriSign is the authoritative directory provider of all .com, .net, .cc, and .tv domain names, and an industry leader in Information Services to globalize access to the Internet.
verisign.com/