Not an usual file explorer
I discovered this little program ((Win, Linux, Android, GNU license), some years ago.
I know that it is not an essential utility, but at least interesting and perhaps it can be of some use for developers and interested in computing.
In principle is a file explorer, but unlike the usual does not show files and systems in the form of a tree, but with a zoom system allows you to travel virtually throughout the system.
Better than long explanations, here are some videos that show it in action
Oficial page and downloads http://eaglemode.sourceforge.net/index.html