GRCs DNS Benchmark - DNS Nameserver Performance Benchmark
PowerDNS - PowerDNS offers open source DNS software, services, and support.
Public DNS Server Tool - Public DNS Server Tool is a small utility for changing the DNS servers in Windows XP, Vista, 7 and...
dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.
namebench - Provides personalized DNS server recommendations based on your browsing history.
Unbound - Unbound is a validating, recursive, and caching DNS resolver.