No-IP - Dynamic DNS and Managed DNS Provider
Unimus - Unimus is a Network Automation and Configuration management (NCM) solution designed for fast deployment network-wide and ease of use. Unimus does not require learning any abstraction or templating languages, and does not require any coding skills.
Duck DNS - Free dynamic DNS hosted on Amazon VPC
Oxidized - configuration backup software (IOS, JunOS) - silly attempt at rancid
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!
RANCID - RANCID - Really Awesome New Cisco confIg Differ.