NameSilo - Domain registration. That's it! And that's what makes it special.
No-IP - Dynamic DNS and Managed DNS Provider
names.co.uk - names.co.uk offers domain name registration, broadband Internet access and web server hosting services.
iWantMyName - Register your own custom domain for web applications, email, blog or website such as Google Apps...
EuroDNS - EuroDNS is a domain name registrar specializing in international domain name extensions.
DNS-O-Matic - DNS-O-Matic (dnsomatic.