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GTK (formerly GIMP ToolKitcite-ref-3[3] and GTK+cite-ref-0-4-0[4]) is a free open-source widget toolkit for creating graphical user interfaces (GUIs)cite-ref-5[5] 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.cite-ref-6[6]

The GTK team releases new versions on a regular basis.cite-ref-roadmap-7-0[7] GTK 4 and GTK 3 are actively maintained, while GTK 2 is no longer supported.cite-ref-8[8] GTK 1 is independently maintained by the CinePaint project.cite-ref-9[9]

• Software architecture

• GTK Drawing Kit (GDK)

• GTK Scene Graph Kit (GSK)

• GtkBuilder

• Language bindings

• Backends

• Development tools

• GUI designers

• GTK Inspector

• Development

• Build automation

• Criticism

• Use

• Applications

• Desktop environments

• Window managers

• GtkSourceView

• GtkSpell

• History

• GTK 2

• GTK 3

• GTK 4

• Releases

• See also

• References

• Bibliography

• External links

The GTK library contains a set of graphical control elements (widgets); version 3.22.16 contains 186 active and 36 deprecated widgets.cite-ref-10[10] GTK is an object-oriented widget toolkit written in the programming language C; it uses GObject (that is, the GLib object system) for object orientation. While GTK is mainly used with windowing systems based on X11 and Wayland, it works on other platforms, including Microsoft Windows (interfaced with the Windows API), and macOS (interfaced with Quartz). There is also an HTML5 back-end named Broadway.cite-ref-1-11-0[11]cite-ref-2-12-0[12]

GTK can be configured to change the look of the widgets drawn; this is done using different display engines. Several display engines exist which try to emulate the look of the native widgets on the platform in use.

Starting with version 2.8, released in 2005, GTK began the transition to using Cairo to render most of its graphical control elements widgets.cite-ref-13[13] Since GTK version 3.0, all rendering is done using Cairo.cite-ref-14[14]

On January 26, 2018 at DevConf.cz, Matthias Clasen gave an overview of the current state of GTK 4 development, including a high-level explanation of how rendering and input worked in GTK 3, what changes are being made in GTK 4 (>3.90), and why.cite-ref-15[15] On February 6, 2019 it was announced that GTK 4 will drop the “+” from the project's name.cite-ref-0-4-1[4]

GDK acts as a wrapper around the low-level functions provided by the underlying windowing and graphics systems.

GSK is the rendering and scene graph API for GTK. GSK lies between the graphical control elements (widgets) and the rendering. GSK was finally merged into GTK version 3.90 released March 2017.

GtkBuilder allows user interfaces to be designed without writing code. The interface is described in an Extensible Markup Language (XML) file which is written by hand or generated by a GUI designer, which is then loaded at runtime and the objects created automatically. The description of the user interface is independent from the programming language being used.

Language bindings are available for using GTK from languages other than C, including C++, Genie, JavaScript, Perl, Python, Vala, and others.cite-ref-16[16]

GTK supports various backends, which provides different ways to display GTK applications depending on the system and environment. Examples of GTK backends are:

• Wayland – Used with the Wayland display server on Linux systems, it is a modern replacement for X11.

• X11 – The default on Linux systems using the X.Org display server.

• Win32 – For running GTK applications on Windows.

• Quartz – For macOS support.

• Broadway – Allows GTK applications to run in web browsers using HTML5 and WebSocket.cite-ref-1-11-1[11]cite-ref-2-12-1[12]

There are several GUI designers for GTK. Here is a selection of GTK GUI designers:

• Cambalache - a successor to Glade, supports GTK 4.cite-ref-17[17]cite-ref-18[18]

• Glade - supports GtkBuilder, which is a GTK built-in GUI description format. (not actively maintained)

• Gazpacho - GUI builder for the GTK toolkit written in Pythoncite-ref-19[19]

• Crow Designer - relies on its own GuiXml format and GuiLoader library.cite-ref-20[20]

• Stetic - part of MonoDevelop, oriented toward Gtk#.

• Gambas (since version 2.0 atop BASIC)

• Xojo

• Lazarus (on Linux defaults to interfacing with GTK 2)

The GTK Inspector is a built-in interactive debugging tool in GTK, allowing developers to inspect and modify UI elements, test CSS changes, and analyze widget structure in real time. It can be enabled using the Control + Shift + I or Control + Shift + D shortcuts, or by setting the GTK_DEBUG=interactive environment variable.cite-ref-21[21] It was introduced with GTK version 3.14.cite-ref-22[22]cite-ref-23[23]

• Interactive debugging

• Real-time CSS testing and modifications

• Widget magnification for detailed inspection

• UI structure analysis and object property examination

• Customizable display settings via environment variables

• Detailed object inspection (type, state, properties, CSS, actions, etc.)

• Global application information display

• CSS rule debugging

• Rendering pipeline recording and inspection

GTK is mainly developed by The GNOME Project, which also develops the GNOME Development Platform and the GNOME Desktop Environment.cite-ref-24[24] GTK is mainly written in C.cite-ref-25[25] Many language bindings are available.

GNOME developers and users gather at an annual GNOME Users And Developers European Conference GUADEC meeting to discuss GNOME's current state and future direction.cite-ref-26[26] GNOME incorporates standards and programs from freedesktop.org to better interoperate with other desktops.

Many GNOME applications have been ported to GTK 4, which was released in December 2020, cite-ref-27[27] however some still use GTK+ 3 (GIMP being a major one).

The master branch of GTK utilizes Meson for its build automation. GTK (and GNOME, GLib, etc.) formerly utilized the GNU Build System (named Autotools) as the build automation system of choice. Since August 14, 2017, the Autotools build system files have been dropped.cite-ref-28[28]

The most common criticism of GTK is the lack of backward-compatibility in major updates, most notably in the application programming interface (API)cite-ref-29[29] and theming.cite-ref-30[30] The result is that application developers or theme developers have to rewrite parts of their code to make it work with a newer version of GTK.

The compatibility breaks between minor releases during the GTK 3.x development cycle was explained by Benjamin Otte as due to strong pressures to innovate, such as providing the features modern users expect and supporting the increasingly influential Wayland display server protocol. With the release of GTK 4, the pressure from the need to innovate will have been released and the balance between stability and innovation will tip toward stability.cite-ref-ottegtk4-31-0[31] Similarly, recent changes to theming are specifically intended to improve and stabilise that part of the API, meaning some investment now should be rewarded later.

• Aurélien Gâteau started Gwenview as GTK application but switched to Qt early in development.cite-ref-32[32]

• Dirk Hohndel, codeveloper of Subsurface and member of Intel's Open-Source Technology Center, criticized the GTK developers for being abrasive and ignoring most community requests.cite-ref-33[33]

• Hong Jen Yee, the creator of LXDE, expressed disdain for the GTK3 toolkit's radical breaking API changes and increased memory usage, leading him to port the project to Qt, renaming it LXQt.cite-ref-34[34]

• The Audacious music player moved to Qt in version 3.6.cite-ref-35[35] The reasons stated by the developers for this include a transition to client-side window decorations, which they claim cause the application to look "GNOME-y and out of place."cite-ref-36[36]

• Wireshark has switched to Qt due to not having a good experience with GTK's cross-platform support.cite-ref-37[37]

• EasyEffects, a popular audio equalizer, is being ported to Qt.cite-ref-38[38]

Some notable applications that use GTK as a widget toolkit include:

• Ardour, a digital audio workstation (DAW)

• Deluge, a BitTorrent client

• Foliate, an ebook reader

• GIMP, a raster graphics editor

• GNOME Core Applications, a collection of applications as a standard bundle of the GNOME desktop environment

• GNOME Circle, a collection of applications created to work within the GNOME ecosystem

• GNOME Evolution, a personal information manager

• HandBrake, digital video transcoder

• Inkscape, a vector graphics editor

• LibreOffice, an office suite

• Lutris, a game manager

• Mozilla Firefox, a web browser

• Mozilla Thunderbird, a personal information manager

• Pitivi, a video editor

• PCSX-Reloaded, a video game console emulator

• REAPER, a digital audio workstation (DAW)

• Remmina, a remote desktop client

• Transmission, a Bit Torrent client

GTK programs can be run on desktop environments based on X11 and Wayland, or others including ones not made with GTK, provided the needed libraries are installed; this includes macOS if X11.app is installed. GTK can be also run on Microsoft Windows. It is used by some popular cross-platform applications like Pidgin and GIMP. wxWidgets, a cross-platform GUI toolkit, uses GTK on Linux by default.cite-ref-39[39] Other ports include DirectFB (for example used by the Debian installer).

Several desktop environments utilize GTK as the widget toolkit.

• GNOME, based on GTK, meaning that programs native to GNOME use GTK

• Budgie, built from scratch for the SolusOS successor, Solus Operating System

• Cinnamon, a fork of GNOME 3 which uses GTK version 3

• MATE, a fork of GNOME 2 which uses GTK 3 since version 1.18

• Xfce, based on GTK 3 since version 4.14

• Pantheon uses GTK 3 & 4, being developed by elementary OS

• Sugar, a desktop environment for youth primary education, which uses GTK, especially PyGTK

• Phosh, a mobile UI designed for PureOS

• LXDE (Lightweight X11 Desktop Environment) is based on GTK 2

• Unity, the former default desktop environment of Ubuntu

• Access Linux Platform (successor of the Palm OS PDA platform)

• Consort, the GNOME 3.4 Fallback Mode – fork from Solus

• GPE, the GPE Palmtop Environment

• ROX Desktop, a lightweight desktop, with features from the GUI of RISC OS

The following window managers use GTK:

• Aewm

• AfterStep

• Amaterus

• Consortium

• IceWM

• Marco

• Metacity

• Muffin

• Mutter

• Sawfish

• Wmg

• Xfwm

For syntax highlighting there is GtkSourceView, "source code editing widget". GtkSourceView is maintained by GNOME separately from GTK as a library: gtksourceview. There are plans to rename to gsv.

GtkSpell is a library separate from GTK. GtkSpell depends on GTK and Enchant. Enchant is a wrapper for ispell, hunspell, etc., the actual spell checker engine/software. GtkSpell uses GTK's GtkTextView widget, to highlight misspelled words and offer replacement.

GTK was originally designed and used in the GNU Image Manipulation Program (GIMP) as a replacement of the Motif toolkit; at some point Peter Mattis became disenchanted with Motif and began to write his own GUI toolkit named the GIMP toolkit and had successfully replaced Motif by the 0.60 release of GIMP.cite-ref-40[40] Finally GTK was re-written to be object-oriented and was renamed GTK+.cite-ref-41[41] This was first used in the 0.99 release of GIMP. GTK was subsequently adopted for maintenance by the GNOME Foundation, which uses it in the GNOME desktop environment.

The GTK 2.0.0 release (2002cite-ref-42[42]) series introduced new features which include improved text rendering using Pango, a new theme engine, improved accessibility using the Accessibility Toolkit, transition to Unicode using UTF-8 strings, and a more flexible API. Starting with version 2.8, GTK 2 depends on the Cairo graphics library for rendering vector graphics.

GTK version 3.0.0 (2011cite-ref-43[43]) included revised input device handling, support for themes written with CSS-like syntax, and the ability to receive information about other opened GTK applications.

The '+' was dropped returning to simply 'GTK' in February 2019 during a Hackathon.cite-ref-44[44]

Release of the first GTK 4 version was in December 2020. At the 2018 edition of DevConf.cz, Matthias Clasen gave an overview of the then-current state of GTK 4 development, including a high-level explanation of how rendering and input worked in GTK 3, what changes were being made to GTK 4, and the reasons for those changes. Examples of things that have become possible with GTK 4 were given as well.cite-ref-45[45]

One of the main changes made during the GTK 4 development cycle (i.e. GTK 3.92, etc.) was the removal of user customization options (like individual keyboard shortcuts that could be set in GTK+ 2), and the delegation of functionality to ancillary objects instead of encoding it into the base classes provided by GTK. Other changes include:

• Event handling from signal handlers described by GtkWidget is delegated to event controllers.

• Rendering is delegated to GtkSnapshot objects.

• The layout mechanism is delegated from GtkWidget to GtkLayoutManager.

| Release series | Initial release |

|---|---|

| Unsupported: 1.0 | 1998-04-13 |

| Unsupported: 1.2 | 1999-02-25 |

| Unsupported: 2.0 | 2002-03-11 |

| Unsupported: 2.2 | 2002-12-22 |

| Unsupported: 2.4 | 2004-03-16 |

| Unsupported: 2.6 | 2004-12-16 |

| Unsupported: 2.8 | 2005-08-13 |

| Unsupported: 2.10 | 2006-07-03 |

| Unsupported: 2.12 | 2007-09-14 |

| Unsupported: 2.14 | 2008-09-04 |

| Unsupported: 2.16 | 2009-03-13 |

| Unsupported: 2.18 | 2009-09-23 |

| Unsupported: 2.20 | 2010-03-23 |

| Unsupported: 2.22 | 2010-09-23 |

| Unsupported: 2.24 | 2011-01-30 |

| Unsupported: 3.0 | 2011-02-10 |

| Unsupported: 3.2 | 2011-09-25 |

| Unsupported: 3.4 | 2012-03-26 |

| Unsupported: 3.6 | 2012-09-24 |

| Unsupported: 3.8 | 2013-03-25 |

| Unsupported: 3.10 | 2013-09-23 |

| Unsupported: 3.12 | 2014-03-25 |

| Unsupported: 3.14 | 2014-09-22 |

| Unsupported: 3.16 | 2015-03-22 |

| Unsupported: 3.18 | 2015-09-23 |

| Unsupported: 3.20 | 2016-03-21 |

| Unsupported: 3.22 | 2016-09-21 |

| Supported: 3.24 | 2018-09-03 |

| Unsupported: 3.90 | 2017-03-31 |

| Unsupported: 3.92 | 2017-10-18 |

| Unsupported: 3.94 | 2018-06-26 |

| Unsupported: 3.96 | 2019-05-07 |

| Unsupported: 3.98 | 2020-02-10 |

| Unsupported: 3.99.0 | 2020-07-31 |

| Unsupported: 4.0 | 2020-12-16 |

| Unsupported: 4.2 | 2021-03-30 |

| Unsupported: 4.4 | 2021-08-23 |

| Unsupported: 4.6 | 2021-12-30 |

| Unsupported: 4.8 | 2022-09-06 |

| Unsupported: 4.10 | 2023-03-04 |

| Unsupported: 4.12 | 2023-08-05 |

| Unsupported: 4.14 | 2024-03-12 |

| Unsupported: 4.16 | 2024-06-09 |

| Latest version: 4.18 | 2025-03-14 |

| Legend: Unsupported Supported Latest ve… | |

| Release series | Major enhancements |

|---|---|

| Unsupported: 1.0 | First stable version |

| Unsupported: 1.2 | New widgets : GtkFontSelector GtkPacker… |

| Unsupported: 2.0 | GObject Overall support for UTF-8 |

| Unsupported: 2.2 | Multihead support |

| Unsupported: 2.4 | New widgets: GtkFileChooser GtkComboBox… |

| Unsupported: 2.6 | New widgets: GtkIconView GtkAboutDialog… |

| Unsupported: 2.8 | Most widgets are rendered by Cairo |

| Unsupported: 2.10 | New widgets: GtkStatusIcon GtkAssistant… |

| Unsupported: 2.12 | GtkBuilder |

| Unsupported: 2.14 | JPEG 2000 load support |

| Unsupported: 2.16 | New widget: GtkOrientable Caps Lock war… |

| Unsupported: 2.18 | New widget: GtkInfoBar Improvement on f… |

| Unsupported: 2.20 | New widgets: GtkSpinner GtkToolPalette… |

| Unsupported: 2.22 | GdkPixbuf moved to separate module Most… |

| Unsupported: 2.24 | New widget: GtkComboBoxText which had p… |

| Unsupported: 3.0 | Development and design of the GTK 3 rel… |

| Unsupported: 3.2 | New widgets: GtkLockButton GtkOverlay N… |

| Unsupported: 3.4 | Menu support in GtkApplication A new co… |

| Unsupported: 3.6 | New widgets: GtkSearchEntry GtkMenuButt… |

| Unsupported: 3.8 | Wayland 1.0 stable support Support for… |

| Unsupported: 3.10 | New widgets: GtkHeaderBar GtkPlacesSide… |

| Unsupported: 3.12 | Client-side decorations Support for Way… |

| Unsupported: 3.14 | GtkInspector (a copy of gtkparasite) in… |

| Unsupported: 3.16 | GDK supports rendering windows using Op… |

| Unsupported: 3.18 | Add CSS node infrastructure More filech… |

| Unsupported: 3.20 | Further Integration of CSS nodes Move d… |

| Unsupported: 3.22 | Last 3.x release Wayland tablet support… |

| Supported: 3.24 | 3.22 was supposed to be the last versio… |

| Unsupported: 3.90 | GTK Scene Graph Kit (GSK) merged Remove… |

| Unsupported: 3.92 | As GNOME 3.26 was released already on S… |

| Unsupported: 3.94 | 3.93 GdkScreen, GdkVisual removed GdkDe… |

| Unsupported: 3.96 | The gtk4-builder-tool simplify command… |

| Unsupported: 3.98 | Performance improvements Drag and drop… |

| Unsupported: 3.99.0 | Introduced successor to Accessibility T… |

| Unsupported: 4.10 | GtkFileChooser deprecated (use GtkFileD… |

| Release series | Latest minor version |

|---|---|

| Unsupported: 1.0 | 1.0. |

| Unsupported: 1.2 | 1.2.10 |

| Unsupported: 2.0 | 2.0.9 |

| Unsupported: 2.2 | 2.2.4 |

| Unsupported: 2.4 | 2.4.14 |

| Unsupported: 2.6 | 2.6.10 |

| Unsupported: 2.8 | 2.8.20 |

| Unsupported: 2.10 | 2.10.14 |

| Unsupported: 2.12 | 2.12.12 |

| Unsupported: 2.14 | 2.14.7 |

| Unsupported: 2.16 | 2.16.6 |

| Unsupported: 2.18 | 2.18.9 |

| Unsupported: 2.20 | 2.20.1 |

| Unsupported: 2.22 | 2.22.1 |

| Unsupported: 2.24 | 2.24.33 (2020-12-21) |

| Unsupported: 3.0 | 3.0.12 |

| Unsupported: 3.2 | 3.2.4 |

| Unsupported: 3.4 | 3.4.4 |

| Unsupported: 3.6 | 3.6.5 |

| Unsupported: 3.8 | 3.8.9 |

| Unsupported: 3.10 | 3.10.9 |

| Unsupported: 3.12 | 3.12.2 |

| Unsupported: 3.14 | 3.14.15 |

| Unsupported: 3.16 | 3.16.7 |

| Unsupported: 3.18 | 3.18.9 |

| Unsupported: 3.20 | 3.20.10 |

| Unsupported: 3.22 | for 3+ years 3.22.29 |

| Supported: 3.24 | 3.23.0 3.23.1 3.23.2 3.23.3 3.24.0 ...3… |

| Unsupported: 3.90 | 3.89.1 3.89.2 3.89.4 3.89.5 3.90 |

| Unsupported: 3.92 | 3.91.0 3.91.1 3.91.2 3.92.1 |

| Unsupported: 3.94 | 3.93 3.94.0 |

| Unsupported: 3.96 | 3.93 3.94.0 |

| Unsupported: 3.98 | 3.96.0 |

| Unsupported: 3.99.0 | 3.99.4 |

| Unsupported: 4.0 | 4.0.3 |

| Unsupported: 4.2 | 4.2.1 |

| Unsupported: 4.4 | 4.4.1 |

| Unsupported: 4.6 | 4.6.9 |

| Unsupported: 4.8 | 4.8.3 |

| Unsupported: 4.10 | 4.10.5 |

| Unsupported: 4.12 | 4.12.5 |

| Unsupported: 4.14 | 4.14.6 |

| Unsupported: 4.16 | 4.16.12 |

| Latest version: 4.18 | 4.18.6 |

• Client-side decoration

• List of widget toolkits

• gtkmm – C++ bindings for GTK

• Enlightenment Foundation Libraries (EFL) – widget toolkit written for the Enlightenment window manager

• FLTK – a light, cross-platform, non-native widget toolkit

• Fox toolkit – a fast, open source, cross-platform widget toolkit

• IUP – a multi-platform toolkit for building native graphical user interfaces

• Ultimate++

• Visual Component Library (VCL)

cite-note-wikidata-79936cce873e218b3504f82035df9344213aa649-v20-11. "4.18.6". June 9, 2025. Retrieved June 9, 2025.

cite-note-22. "The GTK Open Source Project on Open Hub: Languages Page". www.openhub.net. Archived from the original on March 28, 2019. Retrieved March 28, 2019.

cite-note-33. ↑ "A brief description on how GTK was born". www.gtk.org. Archived from the original on June 9, 2023. Retrieved July 5, 2023.

cite-note-0-44. ↑ citerefbassi2019Bassi, Emmanuele (February 6, 2019). "Project rename to "GTK"". mail.gnome.org. GNOME mailinglist. Archived from the original on November 7, 2020. Retrieved February 7, 2019.

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cite-note-66. ↑ "Documentation". www.x.org. Archived from the original on December 21, 2019. Retrieved November 22, 2019.

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cite-note-1010. ↑ "GTK+ 3 Reference Manual". Archived from the original on July 15, 2025. Retrieved July 19, 2025.

cite-note-1-1111. ↑ "Using GTK+ with Broadway". GNOME Developer. GNOME. Archived from the original on June 14, 2021. Retrieved March 6, 2018.

cite-note-2-1212. ↑ "Broadway - GitHub symbiose/symbiose Wiki". GitHub. Archived from the original on June 28, 2023. Retrieved March 6, 2018.

cite-note-1313. ↑ "GTK+ to Use Cairo Vector Engine". February 5, 2005. Retrieved December 27, 2009.

cite-note-1414. ↑ "Gtk: Migrating from GTK 2.x to GTK 3". docs.gtk.org. Archived from the original on May 26, 2023. Retrieved June 16, 2022. All drawing in GTK 3 is done via Cairo.

cite-note-1515. ↑ "Matthias Clasen DevConf.cz 2018 talk about GTK+ 4" (PDF). January 26, 2018. Archived (PDF) from the original on April 22, 2024. Retrieved March 9, 2018.

cite-note-1616. ↑ citerefthe-gtk-teamThe GTK+ Team. "GTK+ Language Bindings". www.gtk.org. Archived from the original on May 25, 2019. Retrieved June 3, 2017.

cite-note-1717. ↑ citerefguadecGUADEC. "Cambalache: road to version 1.0".

cite-note-1818. ↑ "glade - man pages section 1: User Commands". docs.oracle.com. Retrieved September 11, 2024.

cite-note-1919. ↑ "Debian -- Package Search Results -- gazpacho". packages.debian.org. Archived from the original on June 28, 2023. Retrieved November 22, 2019.

cite-note-2020. ↑ "Nothing-personal - A development site for Crow Designer, GuiLoader and Rally - Google Project Hosting". Archived from the original on January 24, 2013. Retrieved February 17, 2014.

cite-note-2121. ↑ "GTK Inspector". GNOME Developer Documentation. Retrieved September 14, 2024.

cite-note-2222. ↑ "Introducing GtkInspector". May 15, 2014. Archived from the original on May 17, 2014. Retrieved May 17, 2014.

cite-note-2323. ↑ "Another GtkInspector update". July 11, 2014. Archived from the original on July 14, 2014. Retrieved July 13, 2014.

cite-note-2424. ↑ "GNOME Quick SWOT Analysis". The GNOME Project. Archived from the original on March 18, 2014. Retrieved March 18, 2014.

cite-note-2525. ↑ "GNOME Languages". Ohloh. Black Duck Software. Archived from the original on May 22, 2014. Retrieved May 22, 2014.

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cite-note-2828. ↑ "Build system change GTK's master branch". mail.gnome.org. Archived from the original on August 15, 2017. Retrieved October 29, 2018.

cite-note-2929. ↑ "How Does One Create A Gtk+ Application? – Morten Welinder". blogs.gnome.org. June 23, 2014. Archived from the original on July 1, 2014. Retrieved June 3, 2017.

cite-note-3030. ↑ citerefmclasen2015mclasen (November 20, 2015). "A GTK+ update". Goings on. Archived from the original on May 2, 2016. Retrieved June 3, 2016.

cite-note-ottegtk4-3131. ↑ "GUADEC2013: Benjamin Otte talks about GTK+". GUADEC. Archived from the original on March 6, 2014. Retrieved March 5, 2014.

cite-note-3232. ↑ citerefaur-lien-g-teau2021Aurélien Gâteau (October 3, 2021). "The story behind Gwenview name". agateau.com. Archived from the original on April 22, 2024. Retrieved December 15, 2024. Yes, you read this right! Gwenview started its life as a GTK+ application!

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cite-note-3434. ↑ citerefhong-jen-yee2013Hong Jen Yee (March 26, 2013). "PCManFM Qt 0.1.0 released". Archived from the original on June 7, 2013. Retrieved September 10, 2014.

cite-note-3535. ↑ "Audacious - An Advanced Audio Player". audacious-media-player.org. Archived from the original on July 28, 2019. Retrieved November 22, 2019.

cite-note-3636. ↑ citereflindgren2014Lindgren, John (May 6, 2014). "Ugly window decorations and how to fix them (GTK 3.12)". Archived from the original on October 13, 2014. Retrieved October 21, 2014.

cite-note-3737. ↑ citerefgerald-combs2013Gerald Combs (October 15, 2013). "We're switching to Qt". Archived from the original on October 19, 2013. Retrieved August 19, 2015.

cite-note-3838. ↑ "Things to do for Qt port · Issue #3521 · wwmm/easyeffects". GitHub. Retrieved July 21, 2025.

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cite-note-4040. ↑ "LinuxWorld - Where did Spencer Kimball and Peter Mattis go?". Archived from the original on April 17, 1999. Retrieved August 19, 2013.

cite-note-4141. ↑ "What is the + in GTK+?". 2011. Archived from the original on March 26, 2012. Retrieved March 18, 2014.

cite-note-4242. ↑ "GTK+-2.0.0 release notes".

cite-note-4343. ↑ "GTK+ 3.0.0 released".

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• citerefkrause2007Krause, Andrew (April 23, 2007), Foundations of GTK+ Development (1st ed.), Apress, ISBN 978-1-59059-793-4

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