Domainz.io - Premium domains, for not so premium prices
Infoblox DDI - Infoblox’s industry leading integrated, centrally managed approach to delivering enterprise-grade DNS, DHCP, and IP address management (DDI) supports current and evolving IT needs.
Brandpa - Domain names for startups
Cisco Umbrella DNS-layer security - Cisco Umbrella DNS-layer security is a leading provider of network and recursive DNS services that provide the quickest and most effective way to improve your security stack.
Undeveloped - Domains you never thought were available
Akamai DNS Security - Akamai DNS Security is a cloud-based DNS solution that helps you sweep away large-scale DDoS threats and malicious attacks.