FreeDomain
Free subdomain registration service with a DNS learning guide
What it is
A free domain service that hands out names under shared extensions such as .dpdns.org, .us.kg and .qzz.io, which you point at any DNS provider through custom nameservers. This repository holds the public documentation, FAQ, and a book-style guide covering DNS, websites, email, and operations; the registration app itself lives in a separate repo. Students and hobbyists use it to put a personal project online without paying for a domain name.