The Norton Commander 3.0
Released in 1989 by Symantec
For DOS

Norton Commander is a MS-DOS based file shell that was widely popular 
due to it's two column design. You could easily copy and move files 
between one folder or another, execute DOS commands and more. It 
competed against many other file managers including Gazelle Q-DOS and 
Xtree

This version includes MCI mail, and an integrated tool for
transferring files between computers.

Archive includes two 5.25" 360k floppy disk images and one 3.5" 720k
floppy disk image.