BIND - BIND is by far the most widely used DNS software on the Internet.
PowerDNS - PowerDNS offers open source DNS software, services, and support.
Unbound - Unbound is a validating, recursive, and caching DNS resolver.
djbdns - The djbdns software package is a collection of Domain Name System tools created by Daniel J.
Knot DNS - High-performance authoritative-only DNS server
NSD - NSD is an authoritative only, high performance, simple and open source name server.