Proxycap - ProxyCap empowers you to divert your PC’s system associations through intermediary servers.
iperf - A TCP, UDP, and SCTP network bandwidth measurement tool
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.
JPerf - This project gives a better UI and new functionalities to the initial JPerf 1.
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.
NetStress - NetStress is a user-friendly benchmarking tool that is mostly used by networking professionals to measure the network performance of both wired and wireless connections.