Great software design and visualization - Space Sniffer

OK, this isn't game related, but I just found a really great disk profiler.  I realized last night that my SSD is filling up on my main Windows computer, and I was trying to delete things to make more room, but I couldn't find much to delete that made a difference.

Today, I figured, there must be some kind of software tool that shows you how your drive is laid out, and I did a search for something.  I found Space Sniffer.  It quickly scans a whole drive and maps it out for you. On the diagram at right, the beige areas are folders and the blue areas are individual files.  Each zone is sized according to its size on the disk, and the hierarchical structure is maintained.  Each folder is clickable, and then the program displays the folder's contents in the same way, so you can descend fractally down into your data.  The authors say the visualization technique was developed by a professor named Ben Shneiderman, who apparently also invented the highlighted textual link.  I will honor his work by linking to him:  Ben Shneiderman

Really neat program, and free.  Of course, I still didn't find too much to delete - the whole left-most rectangle is games I still play, and the other stuff all seemed important.  You'd understand if you saw my basement.