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.
Proxy SwitchyOmega - Proxy SwitchyOmega is the updated version of the proxy settings for easily switching and managing the multiple proxy servers and files within minutes.
OpenSpeedTest - Broadband Internet Speed Test Unlocked!
FoxyProxy - FoxyProxy is a set of proxy and proxy switcher to reach the content of international market and easily switch between multiple proxies and proxy servers.
Ping Meter Gadget - Customizable, graphical, semi-transparent ping (latency) meter.
Proxifier - Proxifier extends the advantages of a proxy server to network applications that don't natively support it.