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.
dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.
Simple DNS Plus - DNS Server for Windows
djbdns - The djbdns software package is a collection of Domain Name System tools created by Daniel J.