| [ATK](https://developer.gnome.org/ATK/stable/) | ATK provides the set of accessibility interfaces that are implemented by other toolkits and applications. Using the ATK interfaces, accessibility tools have full access to view and control running applications. |
| [cairo](http://cairographics.org) | Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), Quartz, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends include OpenGL, BeOS, OS/2, and DirectFB |
| [cairo](http://cairographics.org) | Cairo is a 2D graphics library with support for multiple output devices. Currently supported output targets include the X Window System (via both Xlib and XCB), Quartz, Win32, image buffers, PostScript, PDF, and SVG file output. Experimental backends include OpenGL, BeOS, OS/2, and DirectFB |
| [ffmpeg](https://www.ffmpeg.org/) | A complete, cross-platform solution to record, convert and stream audio and video. |
| [ffmpeg](https://www.ffmpeg.org/) | A complete, cross-platform solution to record, convert and stream audio and video. |
| [FLTK](http://www.fltk.org) | FLTK is a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X. FLTK provides modern GUI functionality without the bloat and supports 3D graphics via OpenGL and its built-in GLUT emulation. |
| [FLTK](http://www.fltk.org) | FLTK is a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X. FLTK provides modern GUI functionality without the bloat and supports 3D graphics via OpenGL and its built-in GLUT emulation. |
| [fontconfig](http://www.freedesktop.org/software/fontconfig) | Fontconfig is a library designed to provide system-wide font configuration, customization and application access. |
| [fontconfig](http://www.freedesktop.org/software/fontconfig) | Fontconfig is a library designed to provide system-wide font configuration, customization and application access. |
| [freetype](http://freetype.org) | FreeType 2 is a software font engine that is designed to be small, efficient, highly customizable, and portable while capable of producing high-quality output (glyph images). It can be used in graphics libraries, display servers, font conversion tools, text image generation tools, and many other products as well. |
| [freetype](http://freetype.org) | FreeType 2 is a software font engine that is designed to be small, efficient, highly customizable, and portable while capable of producing high-quality output (glyph images). It can be used in graphics libraries, display servers, font conversion tools, text image generation tools, and many other products as well. |
| [Gdk-Pixbuf](https://developer.gnome.org/gdk-pixbuf/stable/) | The Gdk Pixbuf is a toolkit for image loading and pixel buffer manipulation. It is used by GTK+ 2 and GTK+ 3 to load and manipulate images. In the past it was distributed as part of GTK+ 2 but it was split off into a separate package in preparation for the change to GTK+ 3. |
| [gettext](http://www.gnu.org/software/gettext/) | GNU `gettext' is an important step for the GNU Translation Project, as it is an asset on which we may build many other steps. This package offers to programmers, translators, and even users, a well integrated set of tools and documentation |
| [gettext](http://www.gnu.org/software/gettext/) | GNU `gettext' is an important step for the GNU Translation Project, as it is an asset on which we may build many other steps. This package offers to programmers, translators, and even users, a well integrated set of tools and documentation |
| [GL2PS](http://www.geuz.org/gl2ps/) | GL2PS: an OpenGL to PostScript printing library |
| [GL2PS](http://www.geuz.org/gl2ps/) | GL2PS: an OpenGL to PostScript printing library |
| [GLib](http://www.gtk.org/) | GLib is one of the base libraries of the GTK+ project |
| [GLib](http://www.gtk.org/) | GLib is one of the base libraries of the GTK+ project |
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| [ParaView](http://www.paraview.org) | ParaView is a scientific parallel visualizer. |
| [ParaView](http://www.paraview.org) | ParaView is a scientific parallel visualizer. |
| [Pillow](http://pillow.readthedocs.org/) | Pillow is the 'friendly PIL fork' by Alex Clark and Contributors. PIL is the Python Imaging Library by Fredrik Lundh and Contributors. |
| [Pillow](http://pillow.readthedocs.org/) | Pillow is the 'friendly PIL fork' by Alex Clark and Contributors. PIL is the Python Imaging Library by Fredrik Lundh and Contributors. |
| [pixman](http://www.pixman.org/) | Pixman is a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterization. Important users of pixman are the cairo graphics library and the X server. |
| [pixman](http://www.pixman.org/) | Pixman is a low-level software library for pixel manipulation, providing features such as image compositing and trapezoid rasterization. Important users of pixman are the cairo graphics library and the X server. |
| [PyCairo](http://cairographics.org/pycairo/) | Python bindings for the cairo library |
| [PyGObject](http://www.pygtk.org/) | Python Bindings for GLib/GObject/GIO/GTK+ |
| [PyGObject](http://www.pygtk.org/) | Python Bindings for GLib/GObject/GIO/GTK+ |
| [PyGTK](http://www.pygtk.org/) | PyGTK lets you to easily create programs with a graphical user interface using the Python programming language. |
| [PyGTK](http://www.pygtk.org/) | PyGTK lets you to easily create programs with a graphical user interface using the Python programming language. |
| [PyQt](http://www.riverbankcomputing.co.uk/software/pyqt) | PyQt is a set of Python v2 and v3 bindings for Digia's Qt application framework. |
| [PyQt](http://www.riverbankcomputing.co.uk/software/pyqt) | PyQt is a set of Python v2 and v3 bindings for Digia's Qt application framework. |
