Alternative apps to SequoiaView:
SequoiaView Alternatives
SequoiaView uses a visualization technique called cushion treemaps to provide you with a single picture of the entire contents of your hard drive.
Standard treemaps often lead to thin rectangles. We have developed a new method to display files : Squarified treemaps. The screen is subdivided such that rectangles approach squares as closely as possible. The screenshot gives an example. Read more.