Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
NetSetMan - Are you tired of changing your network configuration on your laptop every day?
NetTK - NetTK, Network Tool Kit, is an Open Source alternative for monitoring and troubleshooting your...
TCP/IP Manager - Designed to help computer users keep track of their network configuration in different locations.
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.
NCSwitch - NCSwitch4 is a Windows application.