GitHub - xmikos/qspectrumanalyzer: Spectrum analyzer for multiple SDR platforms (PyQtGraph based GUI for soapy_power, hackrf_sweep, rtl_power, rx_power and other backends)
Spektrum: New RTL-SDR Spectrum Analyzer Software
Spectrum Analyser - SDRplay
Why use – Fosphor, a GNU Radio real-time spectrum analyzer? | Arik Yavilevich's blog