Open Atrium is a collaborative office tool based on Drupal

Open Atrium is a team collaboration development system built on the Drupal framework. In addition to the common functions of Drupal, Open Atrium also has the following unique highlights:

Blog: It can be used as an internal discussion tool to express opinions and comments. Supports email notifications. When someone comments on your blog, the system will send an email to your email. You can also reply directly via email, and the reply content will be synchronized to the team's internal system.
Manual: Equivalent to the Wikipedia within the organization, it allows team members to jointly edit documents, view revised versions, and generate a version suitable for printing. It is a good tool for knowledge management.
Calendar: Quickly add event events, support publishing multi-day events, and import events from external calendar services (such as Google Calendar) through subscription.
Task allocation system: A complete task allocation and project management system allows project managers to clearly assign tasks and track project progress in a timely manner.
Team Weibo: Similar to Sina Weibo, it allows team members to quickly share information.
Custom panel: Similar to Google's iGoogle, you can add various components to the custom panel, such as team dynamics, event forecasts, latest comments, etc. Let you see all team activities at a glance.

What can Open Atrium do?
According to the functional characteristics of Open Atrium, Open Atrium is more suitable for corporate intranets and internal team collaboration systems. It can also be used for project management systems, knowledge management systems, etc. Because it is open source software, relying on Drupal's massive module library and its own good architecture, Open Atrium has good scalability and customizability, and can meet your individual needs for intranets.