OCnames.com
Site offers domain name registration services, website hosting, and e-commerce solutions.

Oriweb
Domain name registration, renewal, or transfer.

Order Your Domain
Domain name registration of up to 67 characters.

OZbcoz
Australian company offering discount domain name registration with new .com .au, free parking, email redirection, URL redirection.

OpenSRS
Open Shared Registration System is a cooperative SLD Registration service managed by TUCOWS.com Inc.

OneDNR
Provides domain registration and web hosting for small businesses.

Oz Domains
Registration of Australian and International names.