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..
PingPlotter - PingPlotter is a troubleshooting tool that helps IT professionals and neophytes identify, diagnose, and resolve network issues.
SmokePing - Smokeping is a tool for measuring latency.
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.
WinMTR - Free Network Diagnostic Tool. WinMTR is an equivalent of mtr for Windows.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.