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.
Open Nettest - Open Nettest is a platform for collecting, processing and visualizing data related QoS and QoE.
SmokePing - Smokeping is a tool for measuring latency.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
PingPlotter - PingPlotter is a troubleshooting tool that helps IT professionals and neophytes identify, diagnose, and resolve network issues.
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.