1)   Electrist 1.21
The top-rated electronic & electrical engineering tool for Palm OS with the most advanced interface and hundreds of calculations. Only $20 USD - compare features and price with competing software.
ohms, watts, decibel, dB, delta, wye, voltage drop, VSWR, AWG, mm2,

 2)   Sample Champion 3.6
Powerful real-time software tool designed for high precision acoustic measurements. Impulse Response of a room measurement, loudspeaker Frequency Response analysis. Designed for acoustical technicians, sound engineers, scientists and students.
spectrum analyzer, total harmonic distortion, pink noise generator, speaker design, test and measurement, dsp, frequency response, room acoustics, Impedance, Thiele-Small,

 3)   HAMIC 1.0
The HAM Intelligent Calculator, also called HAMIC, is designed to aid HAM radio operators perform a number of calculations. This includes simple circuits (e.g. resistors), complex circuits (e.g. L networks), or other calculations (e.g. SWR).
ham, calculator, circuits, networks, SWR, reactance, resistors, capacitors, impedance, inductance,