Webp-pixbuf-loader is a WebP format loader of GdkPixbuf.

PNMixer is a simple mixer application designed to run in system tray. It integrates nicely into desktop environments that don't have a panel that supports applets and therefore can't run a mixer applet. In particular, it's been used quite a lot with fbpanel and tint2 but should run fine in any system tray.

PNMixer is designed to work on systems that use ALSA for sound management. Any other sound driver like OSS or FFADO are, currently, not supported. There is no official PulseAudio support, at the moment, but it seems that PNMixer behaves quite well anyway when PA is running.

Gromit-MPX is an on-screen annotation tool that works with any Unix desktop environment under X11 as well as Wayland.

Guile-Cairo wraps the Cairo graphics library for Guile Scheme. Guile-Cairo is complete, wrapping almost all of the Cairo API. It is API stable, providing a firm base on which to do graphics work. Finally, and importantly, it is pleasant to use. You get a powerful and well-maintained graphics library with all of the benefits of Scheme: memory management, exceptions, macros, and a dynamic programming environment.

ClipIt is a clipboard manager with features such as a history, search thereof, global hotkeys and clipboard item actions. It was forked from Parcellite and adds bugfixes and features.

Guile-RSVG wraps the RSVG library for Guile, allowing you to render SVG images onto Cairo surfaces.

This program allows you to display GTK+ dialog boxes from command line or shell scripts. Example of how to use yad can be consulted at https://sourceforge.net/p/yad-dialog/wiki/browse_pages/.

Guile-Present defines a declarative vocabulary for presentations, together with tools to render presentation documents as SVG or PDF. Guile-Present can be used to make presentations programmatically, but also includes a tools to generate PDF presentations out of Org mode and Texinfo documents.

Pangomm provides a C++ programming interface to the Pango text rendering library.

GtkSheet is a matrix widget for GTK+. It consists of an scrollable grid of cells where you can allocate text. Cell contents can be edited interactively through a specially designed entry, GtkItemEntry. It is also a container subclass, allowing you to display buttons, images and any other widget in it. You can also set many attributes such as border, foreground and background colors, text justification and more.

GtkSourceView is a text widget that extends the standard GTK+ text widget GtkTextView. It improves GtkTextView by implementing syntax highlighting and other features typical of a source code editor.

Cairomm provides a C++ programming interface to the Cairo 2D graphics library.

Pango is a library for laying out and rendering of text, with an emphasis on internationalization. Pango can be used anywhere that text layout is needed, though most of the work on Pango so far has been done in the context of the GTK+ widget toolkit. Pango forms the core of text and font handling for GTK+-2.x.

Guile-RSVG wraps the RSVG library for Guile, allowing you to render SVG images onto Cairo surfaces.

Cairo::GObject registers Cairo's types with Glib's type systems, so that they can be used normally in signals and properties.

Guile-Present defines a declarative vocabulary for presentations, together with tools to render presentation documents as SVG or PDF. Guile-Present can be used to make presentations programmatically, but also includes a tools to generate PDF presentations out of Org mode and Texinfo documents.

GtkSpell provides word-processor-style highlighting and replacement of misspelled words in a GtkTextView widget.

Dragon is a lightweight drag-and-drop source for X where you can run:

dragon file.tar.gz

to get a window with just that file in it, ready to be dragged where you need it. What if you need to drag into something? Using:

dragon --target

you get a window you can drag files and text into. Dropped items are printed to standard output.

Layer Shell is a Wayland protocol for desktop shell components, such as panels, notifications and wallpapers. It can be used to anchor windows to a corner or edge of the output, or stretch them across the entire output. It supports all Layer Shell features including popups and popovers.

GTKmm is the official C++ interface for the popular GUI library GTK+. Highlights include typesafe callbacks, and a comprehensive set of widgets that are easily extensible via inheritance. You can create user interfaces either in code or with the Glade User Interface designer, using libglademm. There's extensive documentation, including API reference and a tutorial.

Cairomm provides a C++ programming interface to the Cairo 2D graphics library.

GTKmm is the official C++ interface for the popular GUI library GTK+. Highlights include typesafe callbacks, and a comprehensive set of widgets that are easily extensible via inheritance. You can create user interfaces either in code or with the Glade User Interface designer, using libglademm. There's extensive documentation, including API reference and a tutorial.

GtkDatabox is a widget for live display of large amounts of fluctuating numerical data. It enables data presentation (for example, on linear or logarithmic scales, as dots or lines, with markers/labels) as well as user interaction (e.g. measuring distances).

Perl bindings to the 2.x series of the Gtk+ widget set. This module allows you to write graphical user interfaces in a Perlish and object-oriented way, freeing you from the casting and memory management in C, yet remaining very close in spirit to original API.