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..
Venmon - Compact size system resources monitoring utility and multi-ping tool for Windows
SmokePing - Smokeping is a tool for measuring latency.
Taskbar Meters - Incredibly simple meters that live in the Windows 7 task bar.
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.
Wise System Monitor - Wise System Monitor that is also known as the WideCleaner is a program to monitor the process, hardware and network traffic of any system.