Free / Libre / Open Source software
https://en.wikipedia.org/wiki/Free_and_open-source_software#FLOSS
| Microsoft | WikiSuite |
| Windows Server | ClearOS is regarded as one of the best open source alternatives to Windows Server. It provides server and networking functions, with many features including mail and messaging (IMAP, POP), content filtering, intrusion protection, antimalware and antispam, and file and print services. The current focus is to add JMAP support. |
| Active Directory | OpenLDAP in ClearOS |
| Skype and Lync | Server-side: Openfire + Converse (XMPP) with Jitsi Meet (WebRTC) Desktop client: Pàdé, a Chrome extension with many features. See Pàdé Presentation phone system: FreeSWITCH & FusionPBX. |
| Exchange | JMAP |
| OneDrive | Tiki File Gallery - Data stored on ClearOS Flexshare and Syncthing for automated file synchronization. |
| Project | Tiki Trackers and other features in Tiki can be configured to be a project management tool for a typical organization (most people use a spreadsheet for project management anyway). |
| Visio | Tiki (MxGraph / draw.io) PluginDiagram |
| SharePoint | Forms: Tiki Trackers, Files: Tiki File Gallery |
| SQL Server | For end user databases: Trackers. For a more traditional relational database, use the same as Tiki: MySQL or MariaDB. |
| Office | Tiki-Wiki-CMS-Groupware for most data management as it is the Free/Libre/Open Source Web Application with the most built-in features. |
| Word | Tiki Wiki with or without WYSIWYG |
| Excel | Tiki Spreadsheet |
| PowerPoint | Tiki Slideshow |
| Access | Trackers |
| Outlook | JMAP |
| OneNote | Tiki Notepad |
| Publisher | Tiki offer very good PDF generation with mPDF and plans/ideas to improve as an Online Publishing House |
| Visual Studio | For End user programming, use the existing feature set in Tiki. Especially Trackers. JavaScript, jQuery and many other Wiki Plugins can be used. For more advanced use cases, you can use Tiki as Framework or even direct PHP and JavaScript. |
| Bing | We won't do a search of public data, but for all your internal data: Elasticsearch, including Search within files and increasingly some Natural Language Processing (NLP) features. |
| Dynamics | Tiki Trackers can be configured as a CRM, and the mail integration is being work on via JMAP |
| Yammer | Tiki can be configured to make your own Social Networking site. |
| Windows | Lubuntu |
| System Center | not yet, but it's on the radar. |
| Azure | not yet, but it's on the radar. |