Open-source alternatives to Togetherjs

apprtc is a WebRTC video chat application and signaling server designed to establish peer-to-peer audio and video communication between browsers. It provides a coordination layer using a websocket-based signaling server to exchange session descriptions and network candidates. The project is delivered as a dockerized communication app, allowing for a containerized deployment of the calling service for local development or cloud hosting. It includes a network gateway that integrates STUN and TURN servers to facilitate media flow through firewalls and NATs. The implementation covers peer discov

SimpleWebRTC is a communication framework and real-time media streaming library designed to establish peer-to-peer audio, video, and data streams between web clients. It provides a conference room manager to organize multiple participants into virtual rooms for group interaction. The framework includes a dedicated system for peer-to-peer file transfers and low-latency data messaging. It also features a network traversal configuration tool for managing the servers required to maintain connectivity across firewalls and restrictive network environments. The project covers broad capability areas

Mirotalk is a self-hosted video conferencing platform and peer-to-peer communication server. It utilizes WebRTC for high-resolution video calls, screen sharing, and real-time audio streaming, operating as a decentralized system that routes media streams directly between participants to ensure privacy and low latency. The platform integrates conversational language models and speech recognition to provide real-time transcription and automated meeting tasks. It also functions as a white-label collaboration suite, allowing users to apply corporate visual identities across the interface and sourc

wscat is a command-line WebSocket client and server tool that provides an interactive terminal interface for connecting to WebSocket endpoints, sending and receiving text messages in real time, and managing WebSocket control frames through typed slash commands. It supports basic HTTP authentication by injecting credentials into the initial WebSocket handshake request, and can route connections through an HTTP proxy using the CONNECT tunneling method. The tool includes a built-in WebSocket server mode that listens on a specified port, accepts incoming client connections, and relays messages be

This is a WebRTC video calling platform and browser-based video conferencing tool. It provides an instant communication room generator and an embeddable video call widget for hosting group audio and video calls directly in the browser. The platform enables a no-authentication communication workflow, allowing for the creation of unique, shareable links to establish private video sessions without requiring user account registration or software installation. The system supports real-time group video calling and provides capabilities for integrating the communication interface into external web

Realtime is a real-time data distribution and synchronization engine that enables applications to stream database changes and coordinate state between clients. It functions as a synchronization layer that monitors database write-ahead logs to provide change data capture and pushes updates to authorized clients via WebSockets. The project features a real-time presence server for tracking the online status of active users and a broadcast service for sending ephemeral messages without database persistence. It organizes communication through channel-based message routing and uses a structured JSO

simple-peer is a JavaScript library that provides a wrapper for WebRTC to simplify the establishment of peer-to-peer networking in the browser. It serves as a tool for creating direct device-to-device connections for the transmission of binary data and real-time media streaming. The library manages the exchange of strings and binary buffers through a data channel implementation and provides tools for sharing real-time audio and video tracks between peers. It covers the full lifecycle of peer connectivity, including signaling coordination, session description negotiation, and the gathering of

Mirotalksfu is a WebRTC video conferencing platform and AI-integrated meeting suite. It functions as a real-time communication system for hosting high-resolution audio and video meetings, serving as a self-hosted virtual classroom and a collaborative workspace. The platform distinguishes itself by integrating generative AI assistants, speech recognition, and digital avatars into live sessions. It also operates as an RTMP streaming gateway, allowing users to broadcast live meeting content to external audiences and platforms. The system provides a collaboration suite featuring a shared interac

Lila is an open-source chess server and multiplayer platform designed for playing, analyzing, and streaming games. It functions as a comprehensive environment for hosting competitive play and managing player profiles. The platform integrates a distributed chess engine interface to evaluate complex positions and a collaborative analysis board that allows multiple users to study and coordinate insights in real time. It also includes an online tournament platform for organizing competitive events, simultaneous exhibitions, and structured player leagues. The system maintains a searchable game da

FluidFramework is a real-time collaboration framework and distributed state synchronization engine. It provides a collaborative data model library and a cloud-synced document system designed to replicate data structures across connected clients using ordered operations to ensure eventual consistency. The framework utilizes a client-server relay architecture to route and persist operations without requiring custom server-side business logic. It manages the lifecycle of collaborative sessions through shared data containers and implements conflict resolution strategies, such as last-writer-wins,

This project is a self-hosted note-taking platform and collaborative markdown wiki. It functions as a real-time markdown collaborative editor, allowing multiple users to create, organize, and share documents simultaneously. The platform is designed for self-hosted knowledge management and collaborative markdown documentation, providing a private environment for teams to maintain shared technical notes.

Luckysheet is a web-based spreadsheet component and collaborative editor designed for rendering interactive grids in a browser. It functions as an Excel-compatible data grid that allows for the import and export of spreadsheet files while maintaining tabular data structures. The project provides real-time collaborative editing, synchronizing changes across multiple users to enable simultaneous work on shared documents. It also serves as a JavaScript data visualization tool, converting cell values into graphical charts and visual representations. The platform covers a broad range of data mana

websocket-sharp is a C# library implementation of the WebSocket protocol used for building bidirectional client and server applications. It enables real-time data exchange between endpoints via persistent connections. The library provides specialized networking capabilities, including SSL encrypted networking for secure transport and certificate validation. It also features HTTP proxy tunneling to route traffic through intermediary servers using basic or digest authentication. The project covers a broad range of capabilities, including the implementation of both WebSocket clients and servers

Inertia is a server-driven frontend framework designed to create monolithic single page applications. It acts as a state synchronization protocol and client-side routing bridge, allowing developers to build interactive experiences using modern JavaScript component libraries while keeping routing and controllers on the server. This approach eliminates the need for a separate REST or GraphQL API layer by passing data from server controllers to frontend components as props via JSON payloads. The framework distinguishes itself by utilizing adapter-based integration to link various backend environ

Docmost is an open-source knowledge management system designed as a collaborative documentation platform for teams. It functions as an enterprise wiki that centralizes organizational information into structured, searchable workspaces, enabling users to create, organize, and share content through a hierarchical system of spaces and pages. The platform distinguishes itself by integrating artificial intelligence directly into the documentation lifecycle. It utilizes vector-based semantic search to allow for natural language queries across stored content and provides AI-assisted tools for draftin

This project is a comprehensive diagramming ecosystem that functions as both a standalone cross-platform desktop application and a modular JavaScript library for web-based mind mapping. It provides a visual workspace for structuring hierarchical information, allowing users to create, organize, and manipulate complex node trees through an interactive canvas interface. The platform distinguishes itself through deep integration with artificial intelligence, enabling users to automatically generate, expand, and refine diagram content directly within their workspace. It supports real-time collabor

Bananas is a peer-to-peer screen sharing application that uses WebRTC to establish direct browser-to-browser connections, enabling real-time screen sharing without routing data through a central server. The application assigns ephemeral identity tokens tied only to session IDs, eliminating the need for user accounts or persistent login systems, and generates unique alphanumeric session URLs for one-click joining. The application distinguishes itself through collaborative multi-cursor overlays, where each participant's cursor is rendered as an HTML5 Canvas layer composited over the shared scre

SRS is a real-time media server designed to ingest, route, and distribute live audio and video streams across various transport protocols. It functions as a multi-protocol stream relay, including a dedicated RTMP media gateway and a WebRTC signaling server to coordinate peer-to-peer media exchanges. The system features a multi-protocol relay engine that transforms incoming media packets between different transport formats without re-encoding. This allows it to serve as a video delivery proxy that routes live media from a single source to multiple concurrent viewers using diverse delivery prot

Emitter is a distributed pub-sub platform and message broker that provides real-time data routing between publishers and subscribers across a distributed cluster. It functions as an MQTT message broker for low-power devices and a WebSocket communication server for web-based clients, while acting as a secure channel orchestrator to manage encrypted data streams. The system distinguishes itself through a combination of distributed broker clustering for high availability and a persistence-backed message playback system. This allows the platform to store historical messages and deliver them to su

go-cqhttp is a native Go implementation of the CQHTTP protocol that serves as a messaging platform gateway. It translates network events from the QQ messaging platform into standardized JSON messages, providing a backend for building automated bots. The project distinguishes itself by supporting bidirectional communication through both HTTP APIs and WebSocket connections. It features a flexible execution model that includes both forward and reverse communication modes, allowing remote servers to initiate connections and manage client sessions. The system covers a broad range of capabilities,

Sharedrop is a browser-based file drop application for transferring files directly between devices without requiring software installation or account registration. It uses WebRTC to establish peer-to-peer data channels, allowing files to be exchanged between different operating systems without routing traffic through a central server. The project provides mechanisms for both local and remote connectivity. It identifies active users sharing the same public IP address for immediate local device discovery and allows the creation of private sharing rooms via unique session links for users on diff

Filepizza is a web-based peer-to-peer file sharing application that enables direct browser-to-browser data exchange. It utilizes WebRTC to establish connections between devices, allowing files to be sent without uploading data to a central server. The project provides a password-protected file sharing mechanism that secures transmissions via symmetric-key stream encryption. It includes a containerized signaling server that can be self-hosted to coordinate connections between peers and facilitate NAT traversal across restrictive networks and firewalls. The application supports multi-file tran

AndroidAsync is a non-blocking networking library for Android that provides asynchronous sockets, HTTP clients, and servers based on Java NIO. It serves as a toolkit for managing raw TCP socket connections and bidirectional data streams using an asynchronous input and output architecture. The library includes a dedicated WebSocket framework for establishing persistent full-duplex communication channels between Android clients and servers. It also enables the hosting of a lightweight asynchronous HTTP server directly on an Android device to handle incoming network traffic. Its broader capabil

libhv is a high-performance C/C++ network library and event-driven I/O framework used to build TCP, UDP, SSL, HTTP, WebSocket, and MQTT clients and servers. It provides a non-blocking event loop for managing network sockets, timers, and system signals across multiple threads. The project is distinguished by its integrated support for specialized network roles, including a full HTTP web server with RESTful routing and middleware, an MQTT messaging client for IoT communication, and the ability to implement SOCKS5 and HTTP proxies. It also features a reliable UDP implementation to ensure ordered

jsondiffpatch is a JSON diff and patch library designed to calculate differences between two JSON objects and apply those changes to synchronize states. It functions as a synchronization tool for computing deltas and applying patches to update or revert complex nested JavaScript objects. The project provides a standard-compliant implementation of RFC 6902 JSON Patch for atomic updates and a visual difference renderer that converts data deltas into human-readable HTML views. It includes a specialized text diff tool for performing fine-grained, character-level analysis on long strings within JS

Drogon is a high-performance C++ HTTP web framework and asynchronous web server designed for building web applications and REST APIs. It utilizes an event-driven, non-blocking architecture to handle concurrent HTTP and WebSocket connections, and it implements a model-view-controller structure to separate business logic from presentation. The framework includes an integrated C++ object-relational mapping system and database client for performing asynchronous operations with relational databases and Redis key-value stores. It supports real-time, full-duplex communication via WebSockets and prov

aiohttp is an asynchronous networking framework for Python that provides both an HTTP client and an HTTP server. It utilizes the asyncio library to handle network requests and server-side routing through a non-blocking event loop. The framework includes a dedicated toolkit for establishing persistent bidirectional communication channels, enabling the implementation of both WebSocket servers and clients for real-time data exchange. It covers a broad range of asynchronous network programming capabilities, including the development of web servers with customizable routing and the ability to sen