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
No-IP - Dynamic DNS and Managed DNS Provider
GRCs DNS Benchmark - DNS Nameserver Performance Benchmark
Duck DNS - Free dynamic DNS hosted on Amazon VPC
namebench - Provides personalized DNS server recommendations based on your browsing history.
DirectUpdate - DirectUpdate is a dynamic DNS updater with many features.