Free Sallen-key Software

Filter Wiz Lite by Schematica Software

Active filter design software for lowpass, highpass, bandpass and bandstop electronic filters using resistors, capacitors and op amps. Provides Butterworth, Chebyshev, Elliptic and Bessel Approximations to order 10, with a variety of circuit choices.

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CSDiff by ComponentSoftware Inc.

ComponentSoftware Diff (CSDiff) is a free, advanced file-difference analysis tool for Microsoft Windows. CSDiff is a great asset to anyone in need of analyzing changes which have been made between two revisions of the same file or folder. CSDiff is commonly used when analyzing program source files, HTML documents and MS-Word documents.

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Calc98 by Flow Simulation Ltd.

Calc98 is a Scientific engineering statistical and financial pocket calculator simulator program for the Microsoft Windows operating systems. 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.

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