In the field of desktop environments, there are two desktops that dominate the open source landscape: KDE and GNOME. They are smart, stable, and generally stay out of the way. At the basis of the main KDE technologies is Qt, a free and open source widget toolkit. And at the heart of GNOME is the free and open source GTK toolkit. We recently visited 15 Qt file managers. This article rates 15 GTK file managers.