How to launch applications differently with Gnome-Pie on Linux desktop

The biggest complaint you can hear those days about Ubuntu is the new Unity interface. I remember leaving for Archlinux precisely when Unity started to rise, and when it was made clear that it was here to stay. However, Unity indirectly has led to good consequences: it allowed other distributions and other desktop environments to become more prominent as people were unhappy with it. If your system can support it, no one is against a bit of eye candy. So today I shall propose you a different type of application launcher which is definitely original: Gnome-Pie. Some of you may recognize the inspiration from the World of Warcraft addon “OPie.”