Quadratic-O-Matic

This is a simple, easy to set up as well as use quadratic equation solver. By just typing the numbers and clicking solve, you will be given the roots of the equation.

Cost: Free

OS: Unix, Windows

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The Engineering Units Conversion Calculator

This is an on-line analytical tool that allows users to convert units of thermodynamics, fluid mechanics, economics and other units. Some of these are Energy, Pressure, Volume, Density, Enthalpy and Viscosity.

Cost: Free

Version: 1.0

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AffordaBilly

AffordaBilly is a interest loan calculator. The user can determine the loan he can afford based on the repayments, rate of interests and time of loan period.

Cost: Free

Version: 1.0

OS: All perl supporting OS

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Fatalyzer

Based on skin fold measurements, this CGI script allows visitors to calculate their percentage of body fat. The accuracy is largely based on the accuracy of the measurements and therefore, usage of calipers is recommended. This is a good way to add content to a health site.

Cost: Free

Version: 1.0

OS: Unix, Windows

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The Fluid Flow Calculator

This allows you to calculate pipe friction losses for straight piping that handle water and also that handle water with varying percentages of ethylene glycol. Based on some inputs, it calculates the velocity, the Reynolds number and many more.

Cost: Free

Version: 1.0

OS: Unix

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Geozip

This Perl program facilitates calculation of the distance between two zip codes in the United States. It can also be used to calculate the distance between any two latitude and longitude coordinates with an accuracy of 50 meters.

Cost: $74

Version: 1.21

OS: Unix

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Fatalyzer - Body Fat Calculator

Fatalyzer is a Body Fat Calculator and allows your sites visitors to calculate their body fat. It is a great addon for health based websites.

Cost: Free

OS: Windows 95/98/NT

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VeryInteresting Loan Payment Calculator

This is a loan interest calculator that will show the monthly payment dues for loans wqhen the loan amount, loan period, payment frequencies and interest rates are given.

Cost: Free

Version: 1.0

OS: Windows, Unix

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PayBackTime

This is a simple tool that tells the time for a loan repayment when the amount and interest rates are given. This programme is best suited to calculate the payment times for credit card balance.

Cost: Free

Version: 1.1

OS: Windows , Unix

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calc

This is a simple and basic calculating programme that performs basic mathematic functions such as addition, multiplication, substraction and dividing.

Cost: Free

Version: 1.0

OS: Unix

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