Apps with 'Miller columns' feature
Free dual-pane file manager for Windows featuring tabs, columns, themes, long filename support, image converter, regex renaming and many other unique features.
ForkLift is designed to be the fastest, most powerful file manager for the Mac. Connect to FTP or SFTP servers, manage your Amazon S3 account or your mobile devices over Bluetooth.
ranger is a file manager with VI key bindings. It provides a minimalistic and nice curses interface with a view on the directory hierarchy.
The Finder is the default file manager and graphical user interface shell used on all Macintosh operating systems.
The first multi-column file manager for Windows! The elegance of the Macintosh for your PC.
TkDesk is a graphical file manager for the X Window System used by Unix and Unix-like systems. It is highly configurable since it is based upon tcl and tk.