Software
TigerPack
Implementation, simulation, sensitivity analysis and visualisation of large mathematical models
especially designed for large ecosystem box models.
Mathtools
A set of educational software for visualization of applied mathematics as
- cellular automata
- fractals
- iterated function systems (IFS)
- parabola maps
- solving of ordinary differential equations and slope fields of those
- linear, non-linear, parameterized functions
The package is built on the base of Tcl/TK and GNU-C.
It is developed and tested on OpenSuSE Linux and is ported to run also on Microsoft Windows and MacOS platforms, were 64-bit architectures are assumed.
For the mentioned three operating systems see details at the according section of the MathTools Manual 
Linux
Nothing special to do. Just take care that (at least) python 3.10 with sympy is installed and follow the instructions in the manual.
MathTools for Linux
Windows
You may decide to download the basic package but then you need to take care of a Python environment on your computer to utilize all features of the MathTools.
In that case, we found the most suitable way to install Cygwin from www.cygwin.com .
Please follow the installation procedure for the basic Cygwin system and take care to add python3.12 (at least) and the sympy package.
As an alternative, you may download the package with Python included and MathTools ready to use. The package is quite larger, of course.
MathTools for Windows MathTools for Windows (Python included)
MacOS
On your Mac you need to obtain the Tcl/Tk package from ActiveState according to your desired license model.
Also you should install Python from www.python.org .
Please select the appropriate version of MathTools for your Mac (Intel or ARM) for download.
MathTools for Intel-Macs (x86) MathTools for M*-Macs (arm)
On MacOS you might get a security warning. In that case allow the execution of the application in the security tab of the system settings.
PFotos
PFotos is a little piece of software to make statistics on large amounts of images in different image formats, including raw formats.
PFotos is a stand-alone application that provides statistics on cameras, lenses, aperture and other image information taken from the EXIF data embedded in the images. It is non-destructive and works on large catalogues or directory structures.
PFotos Manual
PFotos for Linux (64 bit) PFotos for MacOS (64 bit) requires Tcl/Tk 8.6.x PFotos for Windows (64bit)
QUARTO Learning Test
With QUARTO and the RevealJS plug-in it is easy to make presentations in markdown. Here we offer an extension to RevealJS to easily set up learning test with single and multiple correct answers. Additionally, help and soltution can be offered to support students.
The extension, its manual and the code of an example can be found on GitHub: Quarto-LearnTest 
.
The rendered result of the example is here: LearnTest Example