https://www.qsl.net/m0ayf/What-is-QRSS.html
https://swharden.com/software/FSKview/qrss/
https://digilander.libero.it/i2phd/argo/
https://www.qsl.net/dl4yhf/spectra1.html
https://www.qsl.net/on7yd/software_main_main.htm