

The LibMaster.com Extendable Calculator is a different way to approach calculator design. Therefore it does not contain any of the design defects, as traditional software calculators and have unlimited ability for extending.
Capable free tape calculator. Evaluate non-trivial expressions like ln(1+2%) * sin(4 5/6)^7. Compact or full-size to edit the tape, re-calculate, cut/paste, save/restore. Select font, button size, show/hide keypad. Many features: see the help file.
Hey, you've already paid $3000 for the hot computer, you might as well have a useful calculator! QuickCalc is a cool little tool which calculates as you type. Massive power and cute as a button. Try it out, you'll be hooked!
ViCalc-Software is a calculator with recording output. In addition ViCalc-Software has got a readout and y-input display in order to get a better view of the running calculation.

ActiCalc Desktop Calculator
$25.00 - Parmerlee, Inc.
Easy-to-use general-purpose desktop calculator featuring a visual tape that behaves like a spreadsheet, recording all calculations and permitting prior entries to be updated. This tape has one-click integration with Microsoft Excel to allow simple calculation sequences to seamlessly evolve into complex spreadsheets. Version 2.5 enables users to cycle through any recently saved calculation tapes with one mouse click.

Loadcalc 2002 Trial Versio
$69.95 - Robert LaCapra
Service/feeder load calculations for single dwelling units Standard Calculation Method (NEC Article 220). Optional Calculation Method (NEC Article 220-30) Additional Loads in Existing Dwelling Units Calculation Method (NEC Article 220-31). Calculates net computed load in VA and amperes, and calculates the total service entrance load. Panelboard Directories: Prints directories for the inside of panelboard doors.

ODEcalc
$53.85 - ECB Enterprise
ODEcalc for Windows: An Ordinary Differential Equation (ODE) Calculator! State your equation and boundary or initial value conditions and it solves your problem. Plots solution, y, and derivative, ydot, versus x. Solves most Boundary Value Problems (BVP) and Initial Value Problems (IVP) for Nth order ODE. ODE may be non- linear, implicit, and any order. Source code included ... it's short! Great teaching tool!

Date Calculator
$25.00 - Leithauser Research
Date Calculator performs various calendar related calculations. It can display a calendar for any month of any year. Calculates the number of days between any two dates, optionally not counting certain days of the week, such as Saturday, Sunday, and user-defined holidays. It can also calculate the date X days before or after a given date. Gives days of week for any date. Includes appointment reminder.

Option Profit Calculator
$25.00 - Leithauser Research
Easily compare stock or option transactions for various time periods and various investments. Input transaction information such as purchase and sale (or execution) dates, prices, etc.. Gives actual profit from the transaction and the potential loss. Also gives annualized profit, in dollars and as percentage of your investment, and annualized potential loss. Factors in your commission fees. Stores results for comparison. Can print results.

HydroCalc PocketPC
$24.95 - Arkansoft
Easy to use calculator for designers of lawn sprinkler systems. Includes both Palm OS and Windows desktop versions. HydroCalc calculates: Maximum system flow Water velocity through various pipe sizes Dynamic pressure based on static pressure, meter size, pipe sizes and materials and length, number and type of fittings, valves and backflow preventer Determines zone or system precipitation rate based on 1 to 3 different methods Much more...
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