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freeglut is a completely OpenSourced alternative to the OpenGL Utility Toolkit (GLUT) library. GLUT was originally written by Mark Kilgard to support the sample programs in the second edition OpenGL 'RedBook'. Since then, GLUT has been used in a wide variety of practical applications because it is simple, universally available and highly portable. GLUT (and hence freeglut) allows the user to create and manage windows containing OpenGL contexts on a wide range of platforms and also read the mouse, keyboard and joystick functions. freeglut is released under the X-Consortium license.

Fyre provides a rendering of the Peter de Jong map, with an interactive GTK+ 2 frontend and a command line interface for easy and efficient rendering of high-resolution, high quality images. This program was previously known as 'de Jong Explorer', but has been renamed to make way for supporting other chaotic functions. All the images you can create with this program are based on the simple Peter de Jong map equations: x' = sin(a * y) - cos(b * x) y' = sin(c * x) - cos(d * y)

GLText is a portable font rendering library for C++ OpenGL applications. It uses FreeType2 to read and render high-quality TrueType fonts with a minimal footprint. With just a few easy lines of C++, you can add gorgeously rendered text to your graphical applications. GLText is an open source project licensed under the LGPL. Basically this means that you can use and link your application with it regardless of what license your application uses. If you make changes to GLText, however, you must make those changes open source under the LGPL. Written with portablility in mind, GLText works on Windows, Linux, FreeBSD and IRIX - virtually anywhere that FreeType2 supports.

This is the pano13 library, part of the Panorama Tools by Helmut Dersch of the University of Applied Sciences Furtwangen. Also included with the library are: - PTOptimizer, a command-line tool for optimizing control points. - panoinfo, a command-line tool for querying the library version. The panorama tools are mainly used to build panoramic images from a set of overlapping images. The usability extends beyond "just" building panoramas by far though. You can, for instance, use them to render an average of multiple images to broaden the dynamic range of the images or average out noise. You can also build object movies with them, morph between images and much more.

Nathive is a libre software image editor, similar to Adobe Photoshop, Corel Photo-Paint or The GIMP, but focused on usability, logic and providing a smooth learning curve for everyone. The project run in the Gnome desktop environment and anyone is welcome to collaborate on it with code, translations or ideas. This project is in the alpha phase, so it is an incomplete work, unfit for the end user yet. The intention is to achieve a professional graphic editor progressively without giving up initial usability. Nathive is written from scratch in C using GTK+, and is designed to be simple, lightweight, and easy to install and use.

Chart::Clicker aims to be a powerful, extensible charting package that creates really pretty output. Clicker leverages the power of Cairo to create snazzy 2D graphics easily and quickly. At it's core Clicker is more of a toolkit for creating charts. It's interface is a bit more complex because making pretty charts requires attention and care. Some fine defaults are established to make getting started easier, but to really unleash the potential of Clicker you must roll up your sleeves and build things by hand.

This module is an attempt to build a general purpose graphing module that is easily modified and expanded. I borrowed most of the API from Martien Verbruggen's GIFgraph module. I liked most of GIFgraph, but I thought it was to difficult to modify, and it was missing a few things that I needed, most notably legends. So I decided to write a new module from scratch, and I've designed it from the bottom up to be easy to modify. Like GIFgraph, Chart::* uses Lincoln Stein's GD module for all of its graphics primitives calls.

This is a module for generating fancy raster plots in color. There is support for drawing multiple datasets on the same plot, over a background image. It's even possible to do shadows with some thinking. It's also possible to generate clean plots without any chartjunk at all. The plot is generated in a few phases. First the initial plot object is generated and contains defaults at that point. Then datasets are added with possible drawing specifications. Most of the actual work is delegated to Imager::Plot::Axis. See the Imager::Plot::Axis manpage for more information on how to control grid generation, ranges for data (zoom).

These utilities display several types of images under X11, or load images onto the X11 root window. A variety of options are available to modify images prior to viewing. These options include clipping, dithering, depth reduction, zoom (either X or Y axis independently or both at once), brightening or darkening, input gamma correction, and image merging. When applicable, these options are applied automatically (e.g. a color image to be displayed on a monochrome screen will be dithered automatically). An utility (xlito) is provided that allows these viewing options to be appended to the image files.

ZBar is an open source software suite for reading bar codes from various sources, such as video streams, image files and raw intensity sensors. It supports many popular symbologies (types of bar codes) including EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 39, Interleaved 2 of 5 and QR Code. The flexible, layered implementation facilitates bar code scanning and decoding for any application: use it stand-alone with the included GUI and command line programs, easily integrate a bar code scanning widget into your Qt, GTK+ or PyGTK GUI application, leverage one of the script or programming interfaces (Python, Perl, C++) ...all the way down to a streamlined C library suitable for embedded use.