Here you will find a directory of free, libre and open source software for the Arch platform. Schools and educators may find open educational resources in the form of Arch software that is useful in the classroom.

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GraphicsMagick is the swiss army knife of image processing.

GraphicsMagick supports huge images and has been tested with gigapixel-size images. GraphicsMagick can create new images on the fly, making it suitable for building dynamic Web applications. GraphicsMagick may be used to resize, rotate, sharpen, color reduce, or add special effects to an image and save the result in the same or different image format. Image processing operations are available from the command line, as well as through C, C++, Lua, Perl, PHP, Python, Tcl, Ruby, Windows .NET, or Windows COM programming interfaces.

General purpose graphics converter. Can convert PDF pages to images. Resizes images, makes them transparent and includes a number of other functions.

Mostly command line, but there are some X11 GUI tools included.


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Crossplatform Gcode and STL viewer for 3D printing.


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Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. FreeCAD is open source (LGPL license) and completely modular, allowing for very advanced extension and customization. FreeCAD is multiplatfom, and reads and writes many open file formats such as STEP, IGES, STL and others. Got yourself a project you want to build, have built, or 3D printed? Model it in FreeCAD. No previous CAD experience required.


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SVG-edit is a fast, web-based, JavaScript-driven SVG editor that works in any modern browser.

CWM Draw Tool, alternative interface for svg-edit, available at:

Java Stencil Report

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Java Stencil Report is a tool that makes writing grades, students evaluations, and school reports faster. A set of pre-defined sentences speeds up the writing process. It has a small vector graphics editor for creating a fully customizable print model, which allows you to print over any kind of school report format, but also export to PDF or PostScript. It is designed for schools, but can be used to write any kind of judgement.


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It's a unique wiki that people love using to keep ideas and information organised.
TiddlyWiki is written in HTML, CSS and JavaScript to run on any reasonably modern browser without needing any Server Side logic. It allows anyone to create personal Self-Contained hypertext documents that can be published to a Web Server, sent by email, stored in a DropBox or kept on a USB thumb drive to make a WikiOnAStick. Because it doesn't need to be installed and configured, it makes a great GuerillaWiki.


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Sigil is a free and open source editor for the EPUB format. It is designed for easy, WYSIWYG editing of EPUB files and for converting other formats to EPUB. It also provides features for advanced users, like direct XHTML, CSS and XPGT editing. You can use it to add any of the metadata entries supported by the EPUB specification and create a hierarchical Table of Contents.

The editor works on all three major platforms: Windows, Linux and Mac OS X.

Sigil is a work in progress, and as such is still missing many features. If you have the programming skills, you can directly contribute to its development. Even if you don’t, just using Sigil and reporting any bugs or missing features on the issue tracker will go a long way towards making it a better application for everyone.


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Mathomatic is a portable, command-line computer algebra system (CAS) written entirely in the C programming language. The software can automatically solve, simplify, combine and compare algebraic equations, perform standard, complex number, modular, and polynomial arithmetic, etc. It does some calculus and is very easy to compile/install, learn and use. Mathomatic consists of a text-mode symbolic math application and library suitable for desktops, servers, handhelds and embedded systems. It compiles and runs under any operating system with a C compiler, including Linux, Unix, Mac OSX and MS-Windows. An operating system is not required for using the symbolic math library and there are no dependencies other than the standard C libraries. The mathematical results should always be correct, simple, and beautiful.

The official Mathomatic website provides download of various versions of Mathomatic, plus a place to read the documentation, learn by example and get free support.

Can also be run as a web service. To run this from the web and access with a browser, see


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Darktable is an Open Source photography workflow application and RAW developer. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.


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imgSeek is a collection of free open source projects for searching a collection of images using visual similarity. The image you are looking for can be expressed either as a rough painted sketch or as another image you supply.

  • Desktop version - a photo collection manager and viewer with content-based search and many other features
  • Server version - for integrating a content-based image database into your own software or image-related web site.


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