Free calculations software for pda

AceIT Calculator - PocketPC Edition, like its desktop counterpart, is also a FREE, comprehensive, easy to use expression calculator, featuring a unique workspace where you can directly enter your expressions to be evaluated. It has similar functionalities as the desktop version of AceIT Calculator - however designed specifically for the PocketPC.
Main features:
- Performs calculations on algebraic expressions - what you see is what you get.
-
- A workspace that stores all of your inputs and results.
-
- Supports more than 100 mathematical functions, including algebraic, transcendental, statistical, financial, calculus, & engineering functions.
-
- Includes over thirty commonly used physical constants & several hundred unit conversion factors.
-
- User-defined value & expression variables

With the program SC-103PU you get a powerful and freely available scientific calculator for the Palm platform.

Apart from scientific functions it also offers a full set of logical operations and conversions between different numeric systems (HEX, DEC, OCT, BIN). Additionally the calculator offers a units mode for easy conversions between different units including currencies, as well as calculations with mixed units.

The program is designed in a way, that it simulates the visual and operational aspects of a true calculator, such that the user will be immediately familiar with its interface.

The calculator program automatically adapts to single and multi color devices. High resolution displays of SONY Clié devices and devices with Palm Operating System 5 and higher are automatically detected and supported.

Available in three different languages: English, German and Esperanto.

The astrolib library calculates planetary positions and timezones.
Positions of sun, moon and planets up to Pluto are calculated with an accuracy of the order of one arc minute for dates less than a century away from now. Calculations are based on approximation formulae by Paul Schlyter, which are in turn based on a preprint of a paper by T. van Flandern and K. Pulkkinen "Low precision formulae for planetary positions", Astrophysical Journal Supplement Series, 1980.

Information is retrieved about locations and time zones on earth, based on UNIX time zone data. The data contains information for over 350 locations world-wide and is even useful for dates centuries before UNIX machines existed. The same information is provided for about 2000 additional locations which have been assigned to UNIX time zone locations.

Currently, astrolib is implemented as a shared library for Palm OS 2.0 or later. It requires the MathLib library. Because the time zone data has been compressed quite a bit and the calculations do not require any external ephemeris data files, the library is only about 100K.

The astrolib source code is distributed under the GNU Lesser General Public License. As I understand the license, this means essentially that you can use astrolib from commercial and non-commercial software, but that you cannot make a commercial product out of a modified version of astrolib. Redistribution under the GNU LGPL is, of course, possible.

This script for Russ Webbs RPN (from nthlab.com) will allow you to calculate using times.

The script works in hour, minute, second or minute, second modes and allows conversion among the formats.

Gratz is a utility that records and reports on the tips or gratuities that a single worker makes.

The reports include: totals, averages, variability calculations (standard deviation), best and worst days.

SciCalc is a small Scientific Calculator for Handhelds.

It does not allow for "Intermediate or Chain Calculations", i.e., you can not perform the following without pressing the equal sign after each operation:

Example: "3 * 2 * 4 + 5 = " IS NOT Allowed.
You must operate on the expression as follows: " 3 * 2 = 6 * 4 = 24 + 5 =29 "

You will notice that the * ; / ; + and - operators are un-enabled after one is pressed and that the " = " blinks.
So you must select the " = " sign to finish the current operation prior to moving on to the next.