Secure Shell (SSH)
a program for logging into a remote machine and for executing commands on a remote machine.
Ncat
a feature-packed networking utility which reads and writes data across networks from the command line. Ncat was written for the Nmap Project as a much-improved reimplementation of the venerable Netcat.
Netcat
reads and writes data across network connections, using the TCP/IP protocol.
ProxyChains
a tool that forces any TCP connection made by any given application to follow through proxy like TOR or any other SOCKS4, SOCKS5 or HTTP(S) proxy.