Supabase is an open source Firebase alternative. Create a backend in less than 2 minutes. Start your project with a Postgres Database, Authentication, instant APIs, realtime subscriptions and Storage.

Troop is a real-time collaborative tool that enables group live coding within the same document across multiple computers. Hypothetically Troop can talk to any interpreter that can take input as a string from the command line but it is already configured to work with live coding languages FoxDot, TidalCycles, and SuperCollider.

Fluid Framework is a collection of client libraries for building distributed, real-time collaborative web applications. These libraries allow multiple clients to simultaneously create and operate on shared data structures using coding patterns similar to those used to work with local data.

A directory of high quality real-time event sources.

CryptPad is the Zero Knowledge realtime collaborative editor.

Encryption carried out in your web browser protects the data from the server, the cloud and the NSA. It relies on the ChainPad realtime engine.

IanniX is a graphical open source sequencer, based on Iannis Xenakis works, for digital art. IanniX syncs via Open Sound Control (OSC) events and curves to your real-time environment.

Faust (Functional Audio Stream) is a functional programming language for sound synthesis and audio processing with a strong focus on the design of synthesizers, musical instruments, audio effects, etc. Faust targets high-performance signal processing applications and audio plug-ins for a variety of platforms and standards.

Web-based text editing tool that allows to edit documents collaboratively in real-time. It implements a CRDT-based consistency maintenance algorithm for strings for peer-to-peer large scale collaboration. This algorithm called LogootSplit can be seen as an extension for variable-sized elements (e.g. strings) of one of the basic CRDT algorithms for unit elements (e.g. characters). Compared to existing web-based collaborative text editing tool MUTE does not require a powerful central server since the server is not performing any computation. Communication between editor instances is done in a peer-to-peer manner thanks to the Netflux library that is based on WebRTC technology. Our editor offers support for working offline while still being able to reconnect at a later time.

Conclave is a peer-to-peer, real-time, collaborative text editor built from scratch in JavaScript. Intrigued by collaborative text editors such as Google Docs, we set out to build our own. This case study walks you through our journey from the initial idea to our research of current academic literature and finally to our design and implementation of the final product.

Teletype for Atom lets developers share their workspace with team members and collaborate on code in real time.

Floobits brings real-time collaborative editing to text editors, IDEs. Collaborative text editors and screen sharing solutions usually suffer from the following problems:

Users are confined to looking at the same thing.
Only one user can edit at a time.
One person is usually stuck in an unfamiliar editor.
Only 2 people can work at a time.

We started building Floobits for ourselves to address these concerns. Floobits allows multiple users to simultaneously edit any file using the text editors they already know.

Tmate is a fork of tmux. It provides an instant pairing / sharing solution for the terminal.

Feathers is a real-time, micro-service web framework for NodeJS that gives you control over your data via RESTful resources, sockets and flexible plug-ins.

RethinkDB is the first open-source, scalable JSON database built from the ground up for the realtime web. It inverts the traditional database architecture by exposing an exciting new access model – instead of polling for changes, the developer can tell RethinkDB to continuously push updated query results to applications in realtime. RethinkDB’s realtime push architecture dramatically reduces the time and effort necessary to build scalable realtime apps.

RethinkDB Horizon is an open-source developer platform for building realtime, scalable web apps. It is built on top of RethinkDB, and allows app developers to get started with building modern, engaging apps without writing any backend code.

Horizon consists of three components:

Horizon server: a middleware server that connects to/is built on top of RethinkDB, and exposes a simple API/protocol to front-end applications.
Horizon client: a JavaScript client library that wraps Horizon server’s protocol in a convenient API for front-end developers.
Horizon CLI: a command line tool, hz, aiding in scaffolding, development, and deployment.

Event-driven, non-blocking I/O with PHP.

React is a low-level library for event-driven programming in PHP. At its core is an event loop, on top of which it provides low-level utilities, such as: Streams abstraction, async dns resolver, network client/server, http client/server, interaction with processes. Third-party libraries can use these components to create async network clients/servers and more.

WebSockets for PHP

Ratchet is a loosely coupled PHP library providing developers with tools to create real time, bi-directional applications between clients and servers over WebSockets. This is not your Grandfather's Internet.

A Scalable Server for Realtime Web Apps

• Stores and syncs data in realtime
• Built in node.js
• Works for browsers, backend & mobile
• Scales via clustering
• Exceptionally fast & easy to use
• Open Source and free (MIT License)