Leaves is a disk usage analyzer inspired by WinDirStat and QDirStat.

It shows files and directories in a hierarchy of nested
rectangles. The area of a rectangle is proportional to its size. A 200
MB file will have twice the size as a sibling with 100 MB. The parent
directory will have about 3 times the area of the smaller file.

However, due to the limited resolution of working at a character
level, this is a fairly coarse approximation compared to a graphical
tool. On the other hand, this will work over remote shell connections
when graphical desktop environments are not available or impractical.