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
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
GRCs DNS Benchmark - DNS Nameserver Performance Benchmark
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
Public DNS Server Tool - Public DNS Server Tool is a small utility for changing the DNS servers in Windows XP, Vista, 7 and...
Zabbix - Track, record, alert and visualize performance and availability of IT resources