GTK+ has been developed for over a decade to be able to deliver the enticing features and superb performance that it brings to your application development. GTK+ is supported by a large community of developers and has core maintainers from companies such as Red Hat, Novell, Lanedo, Codethink, Endless Mobile and Intel.

Language Bindings

GTK+ is available in many other programming languages thanks to the language bindings available. This makes GTK+ quite an attractive toolkit for application development.


GTK+ has a comprehensive collection of core widgets and interfaces for use in your application.

The Widget Factory
  • Windows (normal window or dialog, about and assistant dialogs)
  • Displays (label, image, progress bar, status bar)
  • Buttons and toggles (check buttons, radio buttons, toggle buttons and link buttons)
  • Numerical (horizontal or vertical scales and spin buttons) and text data entry (with or without completion)
  • Multi-line text editor
  • Tree, list and icon grid viewer (with customizable renderers and model/view separation)
  • Combo box (with or without an entry)
  • Menus (with images, radio buttons and check items)
  • Toolbars (with radio buttons, toggle buttons and menu buttons)
  • GtkBuilder (creates your user interface from XML)
  • Selectors (color selection, file chooser, font selection)
  • Layouts (tabulated widget, table widget, expander widget, frames, separators and more)
  • Status icon (notification area on Linux, tray icon on Windows)
  • Printing widgets
  • Recently used documents (menu, dialog and manager)

Cross Platform

Originally GTK+ was developed for the X Window System but it has grown over the years to include backend support for other well known windowing systems. Today you can use GTK+ on:


GTK+ caters for a number features that today's developers are looking for in a toolkit including:

  • Native look and feel
  • Theme support
  • Thread safety
  • Object oriented approach
  • Internationalization
  • Localization
  • Accessibility
  • Bidirectional text support (LTR/RTL, Left To Right/Right To Left)
  • UTF8 support
  • Documentation


GTK+ is built on top of GLib. GLib provides the fundamental algorithmic language constructs commonly duplicated in applications. This library has features such as: (this list is not a comprehensive list)

  • Object and type system
  • Main loop
  • Dynamic loading of modules (i.e. plug-ins)
  • Thread support
  • Timer support
  • Memory allocator
  • Threaded Queues (synchronous and asynchronous)
  • Lists (singly linked, doubly linked, double ended)
  • Hash tables
  • Arrays
  • Trees (N-ary and binary balanced)
  • String utilities and charset handling
  • Lexical scanner and XML parser
  • Base64 (encoding & decoding)


The GMAE (GNOME Mobile & Embedded) initiative has advanced the use, development and commercialization of GNOME components as a mobile and embedded user experience platform. It has brought together industry leaders, expert consultants, key developers and the community and industry organizations they represent. As a direct result of this, GTK+ has features pertaining to mobile and embedded platform requirements.

GTK+ has been involved in a number of embedded initiatives over the past few years including the development of: