Schematica Software

Color picker and color harmonizer tool with eleven harmonious color matches for each selected color, unlimited color schemes to save favorite colors, webpage capture and color sampling, desktop capture, photo color sampling, web-safe and web-smart

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 20, with a variety of circuit choices.