Ghostscript is a processor for PostScript and PDF files. It can rasterize these files to a wide variety of printers, devices for screen preview, and image file formats. Since applications tend to prepare pages for printing in a high-level format such as PostScript, most Unix users with low-level bitmap printers, such as inkjets, use GhostScript as part of the printing process. In addition, Ghostscript is capable of converting PostScript files, functionality comparable to Adobe Acrobat Distiller, but on the command line. In addition, Ghostscript is used for file import and viewing by a great many other applications, including xv, ImageMagick, gimp, and xdvi. Several GUI wrappers for viewing PostScript and PDF files exist, including GSview, ghostview, gv, ggv, and kghostview. This is far from a comprehensive list.
There are many photo-gallery programs available. Zoph is different, as it concentrates on the management of large collection of photos instead of just showing them on the Web. It can store a lot of information about your photos, including the regular EXIF info, photographer, location, title, description, rating, and the people in the photo. Photos can appear in multiple albums and categories. Additional features include search, slideshows, lightboxes, email, access privileges, and multiple languages.
GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software suitable for such tasks as photo retouching, image composition and image authoring. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, a image format converter, etc.
ColorPicker is a red-green-blue color picker with very good precision that integrates with any interface, allowing it to change on the fly. It is designed to work within a graphical component to allow the user a more accessible and flexible interface, and can be applied to regions or text. It is fully compatible with applets designed with the old JDK 1.1 and compatible with any Java Container. Each of red, green and blue are selected according to the full 256 color scale.
album is a free HTML/XHTML photo album and gallery generator that supports themes/skins. You can choose different themes or write your own to get different layouts and styles. It creates all your thumbnails (including directory thumbnails) and descends into directories so you can organize your photos. See the home page for more examples. album is also multi-lingual, with many languages being added all the time. N.B.: The purchase link is provided for donations; the software does not cost anything.
The Noble Ape Simulation is a collection of a number of autonomous simulation components including a landscape simulation, biological simulation, weather simulation, sentient creature (Noble Ape) simulation, and a simple intelligent-agent scripting language (ApeScript). Noble Ape also contains a social simulation where the Noble Apes can be tracked in terms of social groups and also over many generations to explain social phenomenon to users looking to study this kind of interaction. It has been in development for more than a fifteen years.
fPic is a two-part project that aims at providing a replacement Picture class for command-line applications made with REALBasic. It is split into a dynamic library, manip.dylib, and an RB class, fPic. The dylib handles the heavy-lifting, while the fPic class provides a (more or less) seamless way for RB programmers to manipulate images in CLI applications.
Elmer is a computational tool for multi-physics problems that has been developed in collaboration with Finnish universities, research laboratories and industry. It includes physical models of fluid dynamics, structural mechanics, electromagnetics, and heat transfer. These are described by partial differential equations which are solved by the Finite Element Method (FEM). It comprises of several different parts. The geometry, boundary conditions and physical models are defined in ElmerFront. The resulting problem definition is solved by ElmerSolver. Results are the visualized by ElmerPost. An ElmerGrid utility may be used for simple mesh manipulation.