Microsoft SharePoint is not available for Linux but there are some alternatives that runs on Linux with similar functionality. The best free Linux Project Management Tool alternative is Nuclino. If that doesn't suit you, our users have ranked more than 100 alternatives to Microsoft SharePoint and five of them are free and Project Management Tools available for Linux so hopefully you can find a suitable replacement. Other interesting free Linux Project Management Tool alternatives to Microsoft SharePoint are HumHub, Tiki Wiki CMS Groupware, Tracim and Open Atrium.
Nuclino is a unified workspace where teams can bring all their knowledge, docs, and projects together in one place. It’s a modern, simple, and blazingly fast way to collaborate, without the chaos of files and folders, context switching, or silos.
HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful.
Tiki Wiki CMS Groupware is a full-featured, web-based, multilingual (40+ languages), tightly integrated, all-in-one Wiki+CMS+Groupware, Free Source Software (GNU/LGPL), using PHP + Smarty, MySQL, Zend Framework, jQuery and Bootstrap.
All you need in a team collaboration tool dedicated to small efficient teams. Chat, notes, drive, online collaborative edition, calendars, news, spaces, notifications...
Open Atrium is a Drupal distribution that allows you to confidently engage with your colleagues through convenient collaboration.
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A much simpler tool that nonetheless does the same job and does it better. Bloat-free UI.