Go Daddy
Source for domain names, SSL certificates, hosting and related services.

Hostway Solutions
Offers a large variety of website hosting packages plus domain name registration.

Hover Domain And E Mail Registration
Offers a wide variety of domain and e mail options. Reports from users have been quite favorable.

How To Register a Domain Name
This link will take you to a good article on how to secure and register a domain name.

Known Host
Offers a variety of hosting plans plus domain name registration. Choice of two server locations.

Register.com
Offers domain name registration plus a wide variety of related services.