slackbuilds_ponce/office/ganttproject

GanttProject - free tool for project scheduling and management

GanttProject is GPL-licensed (free software) Java based, project
management software that runs under the Windows, Linux and Mac OSX
operating systems.

It features a Gantt chart for project scheduling of tasks, and doing
resource management using resource load charts. It has a number of
reporting options (MS Project, HTML, PDF, spreadsheets).