step

interactive physical simulator for KDE

With Step you can not only learn but feel how physics works. You place some bodies on the scene, add some forces such as gravity or springs, then click "Simulate" and Step shows you how your scene will evolve according to the laws of physics. You can change every property of bodies/forces in your experiment (even during simulation) and see how this will change evolution of the experiment. This package is part of the KDE education module.

sptk

speech signal processing toolkit

The Speech Signal Processing Toolkit (SPTK) is a suite of speech signal processing tools for UNIX environments developed by the SPTK working group and some graduate students in Nagoya Institute of Technology.