
Description: GNU Radio is a free and open-source software development toolkit that provides signal processing blocks to implement software-defined radios and signal processing systems. It can be used for rapid prototyping, experimentation, and education.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: HDSDR is a popular free software-defined radio program for Windows. It supports a wide range of SDR hardware and allows listening to and decoding digital signals like DRM radio, DAB, HD Radio, Inmarsat STD-C EGC, ACARS, ATC, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API