CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
No-IP - Dynamic DNS and Managed DNS Provider
DDoS-GUARD - DDoS protection for websites and networks. CDN included.
Duiadns - free dynamic dns, enhanced ipv6 features, apple routers mDNS support.
Cisco Umbrella - Cisco Umbrella is a cloud security platform that provides the first line of defense against threats on the internet.
DNS-O-Matic - DNS-O-Matic (dnsomatic.