1)   Design Master Electrical 7
Design Master Electrical is an integrated electrical building design and drafting program for AutoCAD. Features include panel schedule, circuiting, feeder sizing, fault current calculations, voltage drop calculations, and photometrics.

 2)   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.