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Best Open Source collaboration Libraries

A curated list of the most popular GitHub repositories tagged with collaboration. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1excalidraw/excalidraw

Virtual whiteboard for sketching hand-drawn like diagrams

117,232TypeScript
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#2tldraw/tldraw

very good whiteboard infinite canvas SDK

45,305TypeScript
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#3RocketChat/Rocket.Chat

The Secure CommsOS™ for mission-critical operations

44,689TypeScript
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#4imputnet/cobalt

best way to save what you love

38,823Svelte
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#5mattermost/mattermost

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

35,393TypeScript
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#6nextcloud/server

☁️ Nextcloud server, a safe home for all your data

34,143PHP
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#7mattermost-community/focalboard

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

25,872TypeScript
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#8zulip/zulip

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

24,705Python
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#9yjs/yjs

Shared data types for building collaborative software

21,261JavaScript
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#10teambit/bit

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

18,356TypeScript
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#11ether/etherpad-lite

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

18,135TypeScript
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#12plait-board/drawnix

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.

13,237TypeScript
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#13Unleash/unleash

Open-source feature management platform

13,214TypeScript
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#14tinode/chat

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

13,093Go
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#15dream-num/univer

Build AI-native spreadsheets. Univer is a full-stack framework for creating and editing spreadsheets on both web and server. With Univer Platform, Univer Spreadsheets is driven directly through natural language.

12,438TypeScript
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#16hackmdio/codimd

CodiMD - Realtime collaborative markdown notes on all platforms.

9,978JavaScript
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#17bigbluebutton/bigbluebutton

A complete web conferencing system for virtual classes and more!

9,040JavaScript
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#18hedgedoc/hedgedoc

HedgeDoc - Ideas grow better together

6,955TypeScript
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