DirSize - Single User Pack Description:

DirSize shows you how much
disk space is used and wasted in each
directory.

Its uses include:

* Finding space hogs on a network
* Finding multiple copies of a single application on a server
* Finding which directories could be archived to save space
(typically those that contain lots of small files)

* Finding where most of the disk space is used

* Finding applications to remove before installing a new one

* Previewing the benefits of a smaller cluster size

* Generating daily, weekly or monthly reports showing how the disk
space distribution has changed. You can easily generate tab- or
comma-delimited output to feed directly into your favourite
spreadsheet for further analysis

* Showing you the complete directory tree