CollabyDraw

Virtual whiteboard for sketching hand-drawn like diagrams

Apache ECharts is a powerful, interactive charting and data visualization library for browser

The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.

The communications platform that puts data protection first.

whiteboard SDK / infinite canvas SDK

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

Luckysheet is an online spreadsheet like excel that is powerful, simple to configure, and completely open source.