Custom Communication Systems

Communication software used to provide remote access to systems and exchange files and messages in text, audio and/or video formats between different computers or users, using their own custom protocols.

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Real-Time Communication Platforms

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AnyCable

Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc.

• Demo: demo.anycable.io
• Source Code: GitHub
• License: MIT
• Tech Stack: Go, Docker

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Centrifugo

Language-agnostic real-time messaging (Websocket or SockJS) server.

• Demo: GitHub demos
• Source Code: GitHub
• License: MIT
• Tech Stack: Go, Docker, K8S

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WBO

Web Whiteboard to collaborate in real-time on schemas, drawings, and notes.

• Demo: wbo.ophir.dev
• Source Code: GitHub
• License: AGPL-3.0
• Tech Stack: Nodejs, Docker

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Matrix Ecosystem

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Element

Fully-featured Matrix client for Web, iOS & Android.

• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: Nodejs

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Synapse

Server for Matrix, an open standard for decentralized persistent communication.

• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: Python, deb

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Conduit

A simple, fast, and reliable chat server powered by Matrix.

• Source Code: GitLab
• License: Apache-2.0
• Tech Stack: Rust

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Notification Services

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Apprise

Send notifications to almost all of the most popular notification services available to us today such as: Telegram, Discord, Slack, Amazon SNS, Gotify, etc.

• Source Code: GitHub
• License: MIT
• Tech Stack: Python, Docker, deb

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Gotify

Notification server with Android and CLI clients (alternative to PushBullet).

• Source Code: GitHub - Server | Clients
• License: MIT
• Tech Stack: Go, Docker

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ntfy

Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify.

• Demo: ntfy.sh/app
• Source Code: GitHub | Clients
• License: Apache-2.0 / GPL-2.0
• Tech Stack: Go, Docker, K8S

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Notifo

Multichannel notification server with support for Email, Mobile Push, Web Push, SMS, messaging and a javascript plugin.

• Source Code: GitHub
• License: MIT
• Tech Stack: C#

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Novu

Notification infrastructure for developers.

• Source Code: GitHub
• License: MIT
• Tech Stack: Docker, Nodejs

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PushBits

Notification server for relaying push notifications via Matrix, similar to PushBullet and Gotify.

• Source Code: GitHub
• License: ISC
• Tech Stack: Go

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Team Collaboration

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Rocket.Chat

Communications platform that puts data protection first (alternative to Gitter.im and Slack).

• Source Code: GitHub
• License: MIT
• Tech Stack: Nodejs, Docker, K8S

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Zulip

Powerful, open source group chat application.

• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: Python

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Tailchat

Next generation noIM application in your own workspace, not only another Slack/Discord/rocket.chat.

• Demo: nightly.paw.msgbyte.com
• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: Docker, K8S, Nodejs

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SAMA

Next-Gen self-hosted chat server and clients.

• Demo: app.samacloud.io/demo
• Source Code: GitHub - Server | Clients
• License: GPL-3.0
• Tech Stack: Nodejs, Docker

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Stoat

User-first chat platform built with modern web technologies.

• Source Code: GitHub
• License: AGPL-3.0 / MIT
• Tech Stack: Rust

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Peer-to-Peer & Privacy-Focused

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Chitchatter

Peer-to-peer chat app that is serverless, decentralized, and ephemeral.

• Source Code: GitHub
• License: GPL-2.0
• Tech Stack: Nodejs

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Databag

Federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, photos, video, and WebRTC video and audio calls.

• Demo: databag.coredb.org/#/create
• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: Docker

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SimpleX Chat

The most private and secure chat and applications platform - now with double ratchet E2E encryption.

• Source Code: GitHub
• License: AGPL-3.0
• Tech Stack: Haskell

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Jami

Universal communication platform which preserves the user’s privacy and freedoms.

• Source Code: Git
• License: GPL-3.0
• Tech Stack: C++

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Tox

Distributed, secure messenger with audio and video chat capabilities.

• Source Code: GitHub
• License: GPL-3.0
• Tech Stack: C

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Decentralized Networks

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GNUnet

Software framework for decentralized, peer-to-peer networking.

• Source Code: gnunet.org/git
• License: GPL-3.0
• Tech Stack: C

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Hyphanet

Anonymously share files, browse and publish freesites (web sites accessible only through Hyphanet) and chat on forums.

• Source Code: GitHub
• License: GPL-2.0
• Tech Stack: Java

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RetroShare

Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer.

• Source Code: GitHub
• License: GPL-2.0
• Tech Stack: C++

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Voice Chat

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Mumble

Low-latency, high quality voice/text chat software.

• Source Code: GitHub | Clients
• License: BSD-3-Clause
• Tech Stack: C++, deb

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Specialized Communication Tools

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GlobaLeaks

Whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform.

• Demo: demo.globaleaks.org
• Source Code: GitHub
• License: AGPL-3.0
• Tech Stack: Python, deb, Docker

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Live Helper Chat

Live Support chat for your website.

• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: PHP

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Tiledesk

All-in-one customer engagement platform from lead-gen to post-sales, from WhatsApp to your website. With omni-channel live agents and AI-powered chatbots (alternative to Intercom, Zendesk, Tawk.to and Tidio).

• Source Code: GitHub
• License: MIT
• Tech Stack: Docker, K8S

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Tinode

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

• Demo: sandbox.tinode.co
• Source Code: GitHub - Server | Clients
• License: GPL-3.0
• Tech Stack: Go

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Typebot

Conversational app builder (alternative to Typeform and Landbot).

• Source Code: GitHub
• License: AGPL-3.0
• Tech Stack: Docker

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Screego

Simple tool to quickly share your screen to one or multiple people via web browser.

• Demo: app.screego.net
• Source Code: GitHub
• License: GPL-3.0
• Tech Stack: Docker, Go

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Spectrum 2

Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks.

• Source Code: GitHub
• License: GPL-3.0
• Tech Stack: C++

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Secret Sharing

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One Time Secret

Share sensitive information securely with self-destructing links that are only viewable once.

• Demo: onetimesecret.com
• Source Code: GitHub
• License: MIT
• Tech Stack: Docker, Ruby, Nodejs

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OTS

One-Time-Secret sharing platform with a symmetric 256bit AES encryption in the browser.

• Source Code: GitHub
• License: Apache-2.0
• Tech Stack: Go

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Shhh

Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates.

• Source Code: GitHub
• License: MIT
• Tech Stack: Python