Amazon Route 53 - Amazon Route 53 is a highly available and scalable DNS web service.
One Word Domains - Database of all available one-word domains
Cloudflare DNS - Install the free app that makes your phone’s Internet more fast, private, and reliable.
Handshake.org - Decentralized certificate authority and naming
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.
NameMing - Get smart domain name suggestions using synonyms, suffixes, prefixes, short url, new gtlds to find the perfect domain name. Generate ideas for social user names and check availability for free!