Abes Drill Tap Chart is a free Pocket PC program that helps to figure out the correct drill sizes when either tapping or drilling clearance holes for common standard and metric bolt threads.
Abes Drill Tap Chart utilizes an XML file to store all the information so that it can easily be modified by the user.

AceIT Calculator is a FREE, comprehensive, easy to use expression calculator, featuring a unique workspace where you can directly enter your expressions to be evaluated.
The workspace stores all of your inputs and results, letting you examine and edit any of your calculations.
The calculator supports more than one hundred built-in functions, including algebraic, transcendental, statistical, financial, calculus, & engineering functions.
It also includes over thirty commonly used physical constants and several hundred unit conversion factors.

Calc98 is a Scientific engineering statistical and financial pocket calculator simulator program.
It includes a comprehensive set of conversions, constants and physical property data, a built-in periodic table of the elements, number base conversions, vectors, matrices and complex numbers.
It is especially suitable for the scientific, engineering, medical and teaching professions and in finance.Download link for other processors:
• MIPS Processors - 488 KB
• SH3 Processors - 491 KB

CalcNOW is a free extendable RPN calculator.
It includes three modules:
1) Scientific
2) Unit Converter
3) Quadratic Solver.
You can create your own modules using Microsofts free eVC++ compiler.
Source code for the modules is included with the download.

DIF is a 6-circle diffractometer angle calculator for Pocket PC. This program bases on M.Lohmeier code.
Installation:
Copy the file to the device (do not uncompres it) double tap the icone. This will start the self instalatin process. The *.cab files are self extracting archives performing the complete instalation.

This free small application allows you to calculate engine power and torque output in 8 different units of measurement. A handy little application for any Auto Enthusiast to have on hand.
To install:
Download the file and unzip it onto your computer.
Copy the unzipped file onto your Pocket PC and your done!

This is a Pocket PC calculator for scientific, and computer math.
This calculator is very bright and easy to use, support more than 50 functions.Update
Correct the mistake of "Percent" function.

Eval is a combined scientific/programmers calculator with a novel method for entering formulas.
It works equally well via keyboard or stylus, and includes three different skins. Update
Fixed problem causing Eval not to auto recalc when using a real keyboard.

This is a pocket PC flow calculator that converts velocity to volumentric flows for use with ultrasonic flowmeters or any other engineered device.

This programs was designed for on site flow calculations of liquids in pipes.
It allows you to calculate simple volumetric flow from two parameters, the pipe internal diameter and the actual velocity and vice versa.
Ideal for gathering information on process flows.