GTK+ 3.24.5 Description:
GTK+ The software is part of the GNU Project and its main goal is to provide a complete set of widgets and APIs that allow developers to create complete application suites. Besides Qt, GTK is the most used toolkit deploying graphical application on top of the X.Org and Wayland display servers. GTK+ is heavily used in the well known GNOME and Xfce desktop environments, but it supports Cinnamon, MATE, LXDE (Lightweight X11 Desktop Environment), Pantheon, Sugar, ROX Desktop, GPE Palmtop environment, Access Linux Platform, and KDE. Several open source window managers use the GTK+ toolkit, including Metacity, Mutter, AfterStep, IceWM, Sawfish, Xfwm, Aewm, Amaterus, Consortium, Marco, and Wmg.