From Elkens software:
Unit Converter Pro for Palm is a handy utility for students, teachers, and practitioners in engineering, physics, sciences, and technical subjects. It can quickly convert more than 1500 different units in 76 categories. It contains the most important conversion factors for length, area, volume, mass, force, pressure, density, energy, power, temperature, dynamic viscosity, kinematic viscosity, and time units. But it provides many high-specialized units and categories, too. Unit Converter Pro for Palm offers customizable databases. You can hide and manage units, and categories.