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.

 2)   Electroguide 2.0
Mathematics formulas with ANNEXE / TABLE and CHART,Tension , Resistance, Current, Power, Capacitive and inductive reactance ,Series and Parallel inductance , constants RL, Wavelenght, Period,Converter, Series circuits RL - RC - RLC and more..

 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).