Fingbox - Fingbox home network security device helps you keep your internet safe and secure, allows you to monitor your household digitally and improve your home Wi-Fi experience.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
MiTec Network Scanner - A free multi-threaded ICMP, Port, IP, NetBIOS, ActiveDirectory and SNMP scanner with many advanced features.
SmokePing - Smokeping is a tool for measuring latency.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
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.