fldigi

Install command: 
brew install --cask fldigi

Name: fldigi

Ham radio digital modem application

https://www.w1hkj.org/

Cask JSON API: /api/cask/fldigi.json

Cask code: fldigi.rb on GitHub

Current version: 4.2.09

Requirements: macOS >= 10.13

Analytics:

Installs (30 days)
fldigi 25
Installs (90 days)
fldigi 96
Installs (365 days)
fldigi 342