tool

• https://grandperspectiv.sourceforge.net/ 
  • GrandPerspective is a small utility application for macOS that graphically shows the disk usage within a file system.
• https://sindresorhus.com/plash 
  • turn webpage into macOS wallpaper
• https://titanium-software.fr/en/onyx.html 
  • OnyX is a multifunction utility that you can use to verify the structure of the system files; perform cleaning and computer maintenance tasks; configure parameters in the Finder, Dock, Safari, and some Apple applications; delete caches; remove certain problematic folders and files; rebuild various databases and indexes; and more. It is a reliable application that provides a clean interface to many tasks that would otherwise require complex commands to be typed using a command–line interface.