dfc

dfc displays file system space usage using graphs and colors. In some ways, it is a modernized version of df as it is able to use colors, draw graphs and export its output to different formats such as CSV or HTML.

dfc is a free software. You can freely download its sources from the files section.
Current release is version 3.1.1: download link

There is an official dfc mirror on GitHub
You can use this platform for any bug report or contributions if you don't feel like opening an account here.