ONLYOFFICE Community Server is a comprehensive open-source system designed to streamline document management, project organization, customer relationship management, and email correspondence. It offers cross-platform functionality, allowing users to access and manage their documents on both Linux and Windows. The system integrates with popular cloud storage platforms such as Google Drive, Box, Dropbox, OneDrive, and OwnCloud, making file sharing and embedding seamless. It also features access rights management, customizable CRM, invoicing system, project management tools including Gantt charts and time tracking, as well as a range of communication features like blogs, forums, polls, and wikis. ONLYOFFICE Community Server is part of the larger ONLYOFFICE Workspace, which includes other components like Document Server, Mail Server, and Talk. The project is distributed under the Apache License and offers user support through their official forum and Stack Overflow.
https://github.com/ONLYOFFICE/CommunityServer