Every once in a while, you find something new (to you) that you want to save. Apparently the terminal app in MacOS Sierra (and OS X before) has a basic connection manager which will allow you to look for the Bonjour/avahi clients on the network to which terminal can connect.
If you are looking for something that keeps track of servers/connections via a GUI, Terminal.app will already do that for you. Launch it and then from the menu select Shell > New Remote Connection. This will give you a connections manager window.