Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
One of the most innovative and simultaneously controversial features of KDE 4 is the Plasma widget, Folderview. Simply put, it allows a user to display the contents of a file system folder within a widget on the desktop.
Beyond just displaying files on your computer, Folderview can be used to launch applications, display remote file systems, filter large folders for particular types of files, or serve as a traditional desktop.
Folderview is a great way to display icons of the applications you use most on the desktop, in an organized fashion. Instead of having them mixed in with documents, shortcuts, and various other icons like on traditional desktops, they can be in their own box. I prefer to have mine in a long rectangle stretched across the length of my panel. Here is how to do it: