Ulmo - Automatically find behaviors that frustrate or irritate users when they use your website.
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
Smartlook - Qualitative analytics for websites and mobile apps Start understanding the 'whys' of your users' behaviors with clear, visual insights. With session recordings and event tracking, you get the complete picture.
GRCs DNS Benchmark - DNS Nameserver Performance Benchmark
VeuUX - Watch and speak to the people on your website, live from your mobile or desktop
namebench - Provides personalized DNS server recommendations based on your browsing history.