SmokePing - Smokeping is a tool for measuring latency.
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.
PingPlotter - PingPlotter is a troubleshooting tool that helps IT professionals and neophytes identify, diagnose, and resolve network issues.
mtr - mtr combines the functionality of the 'traceroute' and 'ping' programs in a single...
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.
iperf - A TCP, UDP, and SCTP network bandwidth measurement tool