SequoiaView is a tool that allows to visualize a file system using
cushion treemaps. I always wanted to visualize the Squeak class
hierarchy that way. At last, I did it:
http://pieber.com/Squeak/SqueakTreeMap.JPG

I don't claim this is very useful but it was fun. :-) A Squeak
implementation of cushion treemaps would be even more fun. ;-)

The code I used to create the directory tree can be found in the file
FileOutDirectoryTree-bp.1.mcz in the following Monticello repository:
MCHttpRepository
	location: 'http://pieber.com/Squeak/mc'
	user: ''
	password: ''

- Bernhard