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.
Proxifier - Proxifier extends the advantages of a proxy server to network applications that don't natively support it.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
redsocks - Redsocks is a daemon running on the local system, that will transparently tunnel any TCP connection...
OpenSpeedTest - Broadband Internet Speed Test Unlocked!
Win10Pcap - Win10Pcap is a WinPcap-based Ethernet packet capture library.