websdr.org
http://websdr.org/
A WebSDR is a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and SDR technology makes it possible that all listeners tune independently, and thus listen to...
GitHub - AlexandreRouma/SDRPlusPlus: Cross-Platform SDR Software
https://github.com/AlexandreRouma/SDRPlusPlus
Cross-Platform SDR Software. Contribute to AlexandreRouma/SDRPlusPlus development by creating an account on GitHub.
Software-defined radio - Wikipedia
https://en.wikipedia.org/wiki/Software-defined_radio
Software-defined radio (SDR) is a radio communication system where components that have been traditionally implemented in hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, etc...
rtl-sdr.com
https://www.rtl-sdr.com/
Good frequency scanners to use, like the Uniden BC125AT and BCT-15X Recommended Software Defined Radios (SDR) ...latest radical changes to the software.