Midnight Commander is a visual file manager, licensed under GNU General Public License and therefore qualifies as Free Software.

Nomad.NET is a freeware orthodox file manager (OFM) for Microsoft Windows.

Nimble Commander is a dual-pane mac file manager with classic design, charged for power users.

Krusader is an advanced orthodox file manager for KDE and other desktops in the Unix.

GNOME Commander is a two-panel graphical file manager for GNOME.