In the process of clearing out old temporary data and reorganising folders, I was looking for a tool to show me where all my disk space had gone. Using 'ls' or 'du' is only so useful and I was stunned to find a peice of software that not only did exactly what I wanted but did much more and all in a simple slick package. Filelight, from Methyl Blue, is a KDE package that visually shows a pie chart of where your files are. It's also clickable to navigate round and it can be used to delete files. Heres a screenshot