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.
Proxycap - ProxyCap empowers you to divert your PC’s system associations through intermediary servers.
SmokePing - Smokeping is a tool for measuring latency.
redsocks - Redsocks is a daemon running on the local system, that will transparently tunnel any TCP connection...
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.