SoftPerfect Network Scanner 

A free multithreaded IP, SNMP and NetBIOS scanner. Both system administrators and users can use this software. It pings computers, scans for listening TCP ports and shows what types of resources are shared on a network (including system and hidden).
shares shared resources scanner hidden snmp

DNS2Go 

DNS2Go is a service for those seeking to leverage the true potential of their computer and Internet connection. Host your own website. Host an FTP server. Host your own email server and provide your family with a highly personalized email address.
dynamic dns dns domain peer mx record email service

Fping 

Fping is a simple ping program, intended to be used instead of the standard ping program that comes with windows. It was first made to ping faster than once every second. Options have been added since then and fping is now a very handy tool.
ping fping pinger fast network tcp tcp/ip status trace route connection internet address