netnewswire

Install command: 
brew install --cask netnewswire

Name: NetNewsWire

Free and open-source RSS reader

https://netnewswire.com/

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

Cask code: netnewswire.rb on GitHub

Current version: 6.2

Requirements: macOS >= 10.15

Conflicts with casks:

netnewswire@beta 6.2 Free and open-source RSS reader NetNewsWire

Versions:

Apple Silicon monterey 6.1.4
big sur 6.1.4
Intel monterey 6.1.4
big sur 6.1.4
catalina 6.1.4

Analytics:

Installs (30 days)
netnewswire 545
Installs (90 days)
netnewswire 1,423
Installs (365 days)
netnewswire 5,273