NetLimiter - NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
NetBalancer - NetBalancer is a Windows application for local network traffic control and monitoring.
SmokePing - Smokeping is a tool for measuring latency.
Bandwidth Manager - Bandwidth management, bandwidth limiting and traffic shaping software for Windows
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.