Installation instructions can be found here:
https://groupoffice.readthedocs.io/en/latest/install/install.html
Group Office is an open source groupware application. It makes your daily office tasks easier. Share projects, calendars, files and e-mail online. It is a complete solution for all your online office needs. From a customer phone call to a project and finally an invoice. The support system helps to keep your customers happy.
Group Office is fast, secure and has privacy by...
Project management and collaboration over the internet. Features team/client sites, task assignment, document repository/workflow, gantt charts, discussions, calendar, notifications, support requests, weblog newsdesk, invoicing, and many other tools.