TCPView - TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on...
PingInfoView - PingInfoView is a small utility that allows you to easily ping multiple host names and IP addresses, and watch the result in one table.
CurrPorts - CurrPorts displays the list of all currently opened TCP/IP and UDP ports on your local computer.
SmokePing - Smokeping is a tool for measuring latency.
Total Network Monitor - Total Network Monitor is a network monitoring software that is designed to continuously monitor your local network, individual computers, and services. Free for 60 days.
PingPlotter - PingPlotter is a troubleshooting tool that helps IT professionals and neophytes identify, diagnose, and resolve network issues.