SVXLink

https://github.com/sm0svx/svxlink

SvxLink is a project that develops software targeting the ham radio community. It started out as an EchoLink application for Linux back in 2003 but has now evolved to be something much more advanced.

There is an EchoLib library

RTLSDR https://www.rtl-sdr.com/svxlink-now-supports-the-rtl-sdr/

SVXPortal

There's a web interface called "svxportal" that I am going to set up on Bellman following some instructions here: https://sk7rfl.se/doc/SvxPortal2.5.pdf