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| Module | Description |
| ------ | ----------- |
| [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 |
| [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. |
| [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 |
| [GLib](http://www.gtk.org/) | GLib is one of the base libraries of the GTK+ project |
| [JasPer](http://www.ece.uvic.ca/~frodo/jasper/) | The JasPer Project is an open-source initiative to provide a free software-based reference implementation of the codec specified in the JPEG-2000 Part-1 standard. |
| [libGLU](ftp://ftp.freedesktop.org/pub/mesa/glu/) | The OpenGL Utility Library (GLU) is a computer graphics library for OpenGL. |
| [Mesa](http://www.mesa3d.org/) | Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics. |
| [ParaView](http://www.paraview.org) | ParaView is a scientific parallel visualizer. |
| [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. |
| [Tk](http://www.tcl.tk/) | Tk is an open source, cross-platform widget toolchain that provides a library of basic elements for building a graphical user interface (GUI) in many different programming languages. |
| [VisIt](https://wci.llnl.gov/simulation/computer-codes/visit) | VisIt is an Open Source, interactive, scalable, visualization, animation and analysis tool |
| [X11](https://www.x.org) | The X Window System (X11) is a windowing system for bitmap displays |