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!
No-IP - Dynamic DNS and Managed DNS Provider
Duck DNS - Free dynamic DNS hosted on Amazon VPC
YDNS - YDNS is a platform that offers several services like a Dynamic Domain Name System to help you remotely access your home network.
Dynu Dynamic DNS - Free dynamic DNS service with powerful features
ClouDNS - ClouDNS is a platform that allows users to keep their websites, data, and network security all the time.