Amazon Route 53 - Amazon Route 53 is a highly available and scalable DNS web service.
Dns Jumper - DNS Jumper is a portable freeware App which makes changing your DNS settings as easy as clicking a button , it is the world's first IPv6 supported Dns tool
ClouDNS - ClouDNS is a platform that allows users to keep their websites, data, and network security all the time.
GRCs DNS Benchmark - DNS Nameserver Performance Benchmark
Cloudflare DNS - Install the free app that makes your phone’s Internet more fast, private, and reliable.
namebench - Provides personalized DNS server recommendations based on your browsing history.