Visualizing your files

Someone recently asked me how to visualize what files are taking up the most space on their hard drive. I decided this was a neat enough thing to do that I'd like to let y'all in on it too. My short answer: Use SequoiaView and/or TreeSize Free.

Sequoia:

Sequoia gives you a nice visual representation of what's going on in your hard drive. The best part is easily the coloring you can set up. Below I have my .jpg files in green, my .mp3 files in red, my .avi files in yellow and my .sys files in blue. Each file is represented by a block and you'll notice that blocks are grouped. For example, there's currently a yellow outline around the My Documents folder. If you hover over a block, you'll get its full path location - great for finding that massive uncompressed .avi you forgot about... Nice.
TreeSize:

If Sequoia is the way to look at the kinds of files eating up your hard drive, then TreeSize is the way to get stats about how much the locations on your hard drive are eating. The killer feature here is the explorer type interface that lets you delve deeper into the file tree. It gets you stats for every sublevel you need - sweet. The blue bars are also pretty neat. They represent the proportion of the hard drive that each folder takes up. Most folders have no apparent bar, but you can see that My Documents has abut 48% of my stuff. Nice.
So what's the verdict? They're both free. Get them both and try not to get lost playing with them (they are dangerously fun).