Clusterssh is a graphical utility that allows you to open several ssh connections and execute commands simultaneously in all of them. I find it powerful in many cases, for example when I’ve to perform a dist-upgrade on many different servers.

It provides a small window to control the sessions, and one xterm window for each one of them. Here are some screen shots using it on Ubuntu and Gnome 2.20.

You can open a ssh session simply clicking on “Host” and then “Add Host”.