| [GraphicsMagick](http://www.graphicsmagick.org/) | GraphicsMagick is the swiss army knife of image processing. |
| [GTK+](https://developer.gnome.org/gtk+/stable/) | The GTK+ 2 package contains libraries used for creating graphical user interfaces for applications. |
| [HarfBuzz](http://www.freedesktop.org/wiki/Software/HarfBuzz) | HarfBuzz is an OpenType text shaping engine. |
| [ImageMagick](http://www.imagemagick.org/) | ImageMagick is a software suite to create, edit, compose, or convert bitmap images |
| [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. |
| [libXt](http://www.freedesktop.org/wiki/Software/xlibs) | libXt provides the X Toolkit Intrinsics, an abstract widget library upon which other toolkits are based. Xt is the basis for many toolkits, including the Athena widgets (Xaw), and LessTif (a Motif implementation). |
| [LittleCMS](http://www.littlecms.com/) | Little CMS intends to be an OPEN SOURCE small-footprint color management engine, with special focus on accuracy and performance. |
| [matplotlib](http://matplotlib.org) | matplotlib is a python 2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms. matplotlib can be used in python scripts, the python and ipython shell, web application servers, and six graphical user interface toolkits. |
| [Mesa](http://www.mesa3d.org/) | Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics. |
| [motif](http://motif.ics.com/) | Motif refers to both a graphical user interface (GUI) specification and the widget toolkit for building applications that follow that specification under the X Window System on Unix and other POSIX-compliant systems. It was the standard toolkit for the Common Desktop Environment and thus for Unix. |
