Although Ubuntu comes with lots of applications that can be installed on your desktop, there are still some applications that are available only from third-party repositories. Finding all these repositories and installing these applications manually is very time-consuming, but fortunately some people have created a script called Automatix2 (which is the successor to Automatix) which automates the task for you. It comes with a graphical interface so that you can run it from your desktop, and this tutorial describes how you do it.