hedgedoc

Virtual whiteboard for sketching hand-drawn like diagrams

whiteboard SDK / infinite canvas SDK

The communications platform that puts data protection first.

Tree view based UML C# MS-SQL OpenApi Database Api table modeler - Code Generator. Saves model to files no db required. Text editors to copy and paste to/from.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

Focalboard is an open source, self-hosted alternative to Trello, Notion, and Asana.

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

Shared data types for building collaborative software

Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.

Etherpad: A modern really-real-time collaborative document editor.