iqmol

Install command: 
brew install --cask iqmol

Name: IQmol

Free open-source molecular editor and visualization package

http://www.iqmol.org/

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

Cask code: iqmol.rb on GitHub

Current version: 3.2.0

Requirements: macOS >= 13

Analytics:

Installs (30 days)
iqmol 5
Installs (90 days)
iqmol 10
Installs (365 days)
iqmol 40