DNS server with easiest GUI - Server Fault
https://serverfault.com/questions/18251Windows' security history makes me hesitant to trust a server out on the net, even though plenty of people do it every day and don't get their servers cracked. It's probably my relative unfamiliarity with the OS that leads me to this prejudice. But if GUI is your only concern, there's nothing I've seen easier than Windows DNS server.
a small open-source DNS server - MaraDNS
https://maradns.samiam.orgMaraDNS is a free open-source computer program written by Sam Trenholme. MaraDNS implements the Domain Name System (DNS), an essential internet service. MaraDNS is open source software: This means that anyone is free to download, use, and modify the program free of charge, as per its license . People like MaraDNS because it’s small ...
Atomia DNS | A Free, Open Source DNS Management ...
atomiadns.comAtomia DNS is open source and you are more than welcome to contribute to the development of the product. It is also free to use. No strings attached! Read more. Production ready. Atomia DNS has been used in large-scale production environments for several years and was built with mass DNS hosting in mind.