JellyfiSSH is a GUI frontend to the ssh utility. In the Terminal, ssh allows you to connect to and operate other computers. With JellyfiSSH you don’t need to memorize all the command line options; you can choose them within JellyfiSSH and then launch a Terminal session. With JellyfiSSH you can also create ssh tunnels. A couple of uses of ssh tunnels are to relay mail through your server even if your hotel network blocks outgoing mail and to control another computer with VNC over a secure, encrypted channel.