Alfresco has added SharePoint Protocol support to the Open Source ECM Alfresco Labs (Beta) 3.

Microsoft Graph provides one unified API to search all content in SharePoint, OneDrive, Outlook, and other Microsoft 365 services. That changes how we build SharePoint applications.

Software developers use open source code for free, but when they want to commercialize work built on top of it, it establishes principles for compensating the open source creators or community.