Multiping - Get MultiPing Support. Network monitoring in 60 seconds. MultiPing provides a graphical view of network performance, monitors hundreds of targets, and sends automatic alerts..
TCPView - TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on...
SmokePing - Smokeping is a tool for measuring latency.
TcpView For Linux - TcpView For Linux. Touch screen friendly design graphical network connections viewer for Linux.
Fping (open source) - fping is a program to send ICMP echo probes to network hosts, similar to ping, but much better performing when pinging multiple hosts.
NetStat Agent - At whatever point you open a site association through your program or download documents, you are opening TCP/UDP connions.