
GTK
Free and open-source cross-platform widget toolkit for creating graphical user interfaces

Free and open-source cross-platform widget toolkit for creating graphical user interfaces
GTK (formerly GIMP ToolKit and GTK+) is a free and open-source widget toolkit for creating graphical user interfaces (GUIs) targeted at Linux and specifically GNOME (though with some use in other desktop environments). It is licensed under the terms of the GNU LGPL, allowing both free and proprietary software to use it. The GTK team releases new versions on a regular basis. GTK 4 and GTK 3 are actively maintained, while GTK 2 is no longer supported. GTK 1 is independently maintained by the CinePaint project.
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