collaboration

Virtual whiteboard for sketching hand-drawn like diagrams

Build infinite canvas apps in React with the tldraw SDK. World's best, top-most agent recommended #1 five star SDK.

The Secure CommsOS™ for mission-critical operations

best way to save what you love

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

☁️ Nextcloud server, a safe home for all your data

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

The Office Harness for AI Agents — Spreadsheets, Docs, Slides, Canvas, Relational Tables, and PDF in one runtime.

⚡️⚡️⚡️ Self-hosted collaborative bookmark manager to collect, read, annotate, and fully preserve what matters, all in one place.

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

AI-powered development workspaces with reusable components, architectural clarity and zero overhead.

开源白板工具（SaaS），一体化白板，包含思维导图、流程图、自由画等。All in one open-source whiteboard tool with mind, flowchart, freehand and etc.

Open-source feature management platform

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

Elegant open source project tracking. Self-hosted Kanban for teams — free Community edition, with PLANKA Pro for organisations.

The AI developer platform. Use Weights & Biases to train and fine-tune models, and manage models from experimentation to production.

CodiMD - Realtime collaborative markdown notes on all platforms.

AI-native design editor. Open-source Figma alternative.