1)   RAL / Realtime Analyzer Light 2.0.0.2
Quality sound measurement software equivalent to at least US$10,000 hardware.You can use it for wide scope of audio and acoustics: car audio, home audio, concert hall and room acoustics, sound analysis and noise measurement.

 2)   JMathLib 0.9.0
JMathLib is a clone of Matlab but written 100% in java. It can be extended very simply with m-files an java classes.

 3)   PDAcalc matrix 1.66
Programmable graphical matrix calculator for PDA's and windows. This program was especial designed for palm devices and the PocketPC but also runs on windows platforms. Using the windows makes writing and debugging scripts, when needed, very easy.