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GTK is an Acronym for the Gimp ToolKit. Initially created for the graphics program GIMP, the GIMP Toolkit - abbreviated as GTK+ - is one of the two most popular widget toolkits for the X Window System, intended for creating graphical user interfaces. It's officially known as GTK+, but the little '+' is often left out in calling its name.
- GTK+ and Qt toolkit have supplanted Motif, previously the most widely-used X widget toolkit.
Licensed under the LGPL license (GNU Lesser General Public License), GTK+ is free software (and open source) software, and is part of the GNU Project.
Desktop environments and Window manager that uses GTK
- The GNOME environment uses GTK+ as a base, which means that programs written for GNOME use GTK+ as their toolkit.
- Xfce also uses it as their base, though their apps typically do not depend on as many programs. (This is the difference between something being branded as a "GNOME program" and as a "GTK+ program".)
- The GPE Palmtop Environment and Maemo, Nokia's internet tablet framework, also use GTK+ as a base.
- Fluxbox uses GTK+.
Resources
GTK official website is http://www.gtk.org