ganttproject

Install command: 
brew install --cask ganttproject

Name: GanttProject

Gantt chart and project management application

https://www.ganttproject.biz/

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

Cask code: ganttproject.rb on GitHub

Current version: 3.3.3316

Requirements: macOS >= 10.15

Versions:

Intel tahoe 3.3.3316
sequoia 3.3.3316
sonoma 3.3.3316
ventura 3.3.3316
monterey 3.3.3316
big sur 3.3.3316
catalina 3.3.3316

Analytics:

Installs (30 days)
ganttproject 58
Installs (90 days)
ganttproject 166
Installs (365 days)
ganttproject 611