TreeSize is a useful utility for freeing up disk space. No matter how much disk space one gets there is never enough of it. Over time it gets used up and you invariably need to determine where the space went to. TreeSize helps you to pinpoint this very easily and clean up your hard drive to free up some of that space. I can't think of anything that needs to be added to this useful tool- perhaps the user interface could be modernized a little bit?