Free geometric distortions software for windows

GML Undistorter is created for correcting lens distortions, which occur especially when taking pictures.
This barrelling distortion effect occurs often both in amateur and professional photography. It allows to easily eliminate camera distortion in ones photos.
This software uses an algorithm for estimating the expected distortion from the EXIF information, included in JPEG files produced by most modern cameras. If the EXIF information is not available the user needs to enter the focal length this picture was taken with (at least approximately).
If the estimated distortion is not exact, the user can adjust the correction manually with the Fine tune slider.

jscl-meditor is a java symbolic computing library and math editor, with: polynomial system solving, simplification, MathML output, vectors & matrices, factorization, derivatives, integrals (rational functions), boolean algebra, java code generation, geometric algebra.
The goal of this project is to provide a java symbolic computing library and a mathematical editor acting as a front-end to the former.
There are several computer algebra systems available on the market, most of them developed in other languages, mainly C/C++ and Lisp. But the benefits of using java in symbolic computation are great.
Aside from being widely used and to comply with various standards, this language has two features of concern : readability and portability.
Regarding readability, the goal is to produce a code as nice and short as the pseudo-code found in textbooks or research papers.
As for portability, it means that a lot of platforms are available at no cost, from powerful unix workstations or servers to handheld devices.
To make it possible, the project is split in two parts : the engine (jscl) and the mathematical editor front-end (meditor). The engine is usable interactively or in batch mode from a java shell interpreter (like BeanShell for instance), or as a java library in any third-party application.
Main features:
- Polynomial system solving
- Vectors and matrices
- Factorization
- Derivatives
- Integrals (rational functions)
- Boolean algebra
- Simplification
- Geometric algebra
- Java code generation
- Graphical rendering of math expressions

KOCH QUADRAT is a font that was designed after the great designers work Rudolf Koch (1876-1934). Among his many remarkable and long-lived font designs are Kabel (also called Cable, Geometric 231, Boulder), Koch Antiqua (Eve, Locarno, Lilith), Neuland (100 other names and variants, including my Bride), Wilhelm Klingspor Gotisch, and many others. Koch was a calligrapher, a pious man, a teacher, and war veteran.
Koch Quadrat is derived from his demonstration of constucting each Roman capital. Using simple geometric elements, Koch developed a set of seven diagrams (appearing in the center of the animation aboce) combining similar letters within a square (Quadrat). These would make fine initials and combine easily with Kabel, Koch Antiqua and others.
The free font contains all elements of all 26 letters and Kochs seven diagrams of overlapping letterforms at the 1-9 locations.