Fibonacci Calculator

ODEcalc
Free - Optimal Designs Enterprise

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

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Income Tax Calculator
Free - Ashkon Technology LLC

This tax calculator instantly estimates your US federal income tax and finds your tax brackets. Tax brackets show percentage of tax that you pay on additional income. Income Tax Calculator shows current and past tax brackets and estimates federal tax for tax years 2000-2008. It includes an option of different filing status and shows average tax, the percentage of tax that you pay relatively to your total income.

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WorldCalc
Free - Cloanto Corporation

WorldCalc is a calculator and currency converter with daily exchange rate updates provided by Cloanto, a leader in currency software and services. Features include support for past and future euro currencies, a spreadsheet interface and translucent skins. The unregistered version displays an advertising banner. The registered version can use more than 100 different skins.

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SkinCalc
Free - Cloanto Corporation

SkinCalc, which is completely free, features standard and advanced calculator functionality, a spreadsheet interface, and skins. Skins make it possible to change the layout and functionality of the software, with effects that include non-rectangular shapes, user-configurable transparency and alpha channel translucency. More than 100 skins are available from the sites listed at skincalc.com, which also has instructions to create your own skins.

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