DG2YCB

I am the author of the amateur radio software wsjt-x_improved, jtdx_improved, and ExtIO_RTLTCP_improved, as well as co-author of the original WSJT-X. The WSJT-X program family is about weak signal communication and uses modes like FT8, FT4, Q65, JT65, JT9 and so on. ExtIO_RTLTCP_improved is a driver for SDR receivers. You can find all these programs on SourceForge and download them for free.
URLs:
wsjt-x-improved.sourceforge.io/
jtdx-improved.sourceforge.io/
sourceforge.net/projects/extio-rtltcp-improved/