(via www.ubuntugeek.com)
GNOME Commander is a free two pane file manager in the tradition of Norton and Midnight Commander, it is built on the GTK-toolkit and GnomeVFS. GNOME Commander aims to fulfill the demands of more advanced users who like to focus on file management, their work through special applications and running smart commands. This program is not aimed at users wanting the weather forecast in a sidebar in their file manager.