Filter Wiz Lite is a Education::Science software developed by Schematica Software. After our trial and test, the software was found to be official, secure and free. Here is the official description for Filter Wiz Lite: 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. you can download Filter Wiz Lite 1.27 free now.