"Since its inception, the Xfce desktop environment has aimed to provide high functionality with only modest demands on system resources, with the overarching goal of leaving more facilities for the user to run applications. One of the significant changes in recent releases of Xfce 4 is the Thunar file manager, which replaces the original xffm. Thunar does a good deal to advance the goals of its parent project: it's fast and lean, especially by today's standards of hardware, yet it offers rich functionality. Like its namesake, Thunor, the Saxon god of thunder, Thunar is much smaller than ;giants' like Konqueror and Nautilus, yet powerful in its own right. If you want some of the functionality afforded by the GUI file managers of the larger desktop environments, but with less overhead, Thunar may fit your needs.
"Getting Thunar is fairly trivial, given that most recent distributions package Xfce 4. Once you have it, you can start it from within Xfce from the desktop or panel launchers, or from outside of Xfce by running the command Thunar--an exception to the Unix lower-case convention..."
