fft

Sonic Visualiser is a free, open source, cross-platform desktop application for music audio visualisation, annotation, and analysis.

Sante FFT Imaging is a program that removes pattern noise from DICOM and plain images (jpg, tif, png and bmp). This type of noise is very common in images that have been digitized with a CR digitizer.

Spectrum analyzer for multiple SDR platforms (PyQtGraph based GUI for soapy_power, hackrf_sweep, rtl_power, rx_power and other backends)

Software defined radio receiver powered by GNU Radio and Qt.