I just released VIRGO: An open-source Spectrometer for Radio Astronomy
VIRGO is an easy-to-use open-source spectrometer and radiometer based on Python and GNU Radio Companion (GRC) that is conveniently applicable to any radio telescope working with a GRC-supported software-defined radio (SDR). In addition to data acquisition, VIRGO also carries out automated analysis of the recorded samples, producing an averaged spectrum , a calibrated spectrum , a dynamic spectrum (waterfall) , as well as a time series (power vs time) plot.
PICTOR is also based on the VIRGO spectrometer.
You can download and install VIRGO here: https://github.com/0xCoto/VIRGO
As always, feedback and criticism is welcome and encouraged!
Special thanks to Cees for his initial contributions to the software!