OpenDNS - OpenDNS provides faster and safer Internet access for your home or Business.
No-IP - Dynamic DNS and Managed DNS Provider
Quad9 - Quad9 is a free, recursive, anycast DNS platform that provides end users robust security protections, high-performance, and privacy.
FreeDNS by Afraid.org - Free DNS hosting, lets you fully manage your own domain. Dynamic DNS and Static DNS services available. You may also create hosts off other domains that we host upon the domain owners consent, we have several domains to choose from!
1.1.1.1 - The free app that makes your Internet safer.
Duck DNS - Free dynamic DNS hosted on Amazon VPC