Communication - 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.
Software#
This page lists all projects in this category. Use the index of all projects, the sidebar, or click on tags to browse other categories.
AnyCable#
Realtime server for reliable two-way communication over WebSockets, Server-sent events, etc.
Apprise#
Apprise allows you to send a notification to almost all of the most popular notification services available to us today such as: Telegram, Discord, Slack, Amazon SNS, Gotify, etc.
Centrifugo#
Language-agnostic real-time messaging (Websocket or SockJS) server.
Chitchatter#
Peer-to-peer chat app that is serverless, decentralized, and ephemeral.
Conduit#
A simple, fast, and reliable chat server powered by Matrix.
★? ? Rust Apache-2.0
Databag#
Federated, end-to-end encrypted messaging service for the web, iOS, and Android, supporting text, photos, video, and WebRTC video and audio calls.
★1291 2025-08-15 Docker Apache-2.0
Element#
Fully-featured Matrix client for Web, iOS & Android.
★12018 2025-08-26 Nodejs Apache-2.0
GlobaLeaks#
Whistleblowing software enabling anyone to easily set up and maintain a secure reporting platform.
GNUnet#
Software framework for decentralized, peer-to-peer networking.
Gotify#
Notification server with Android and CLI clients (alternative to PushBullet).
Hyphanet#
Anonymously share files, browse and publish freesites (web sites accessible only through Hyphanet) and chat on forums.
Jami#
Universal communication platform which preserves the user’s privacy and freedoms.
Live Helper Chat#
Live Support chat for your website.
★2115 2025-08-26 PHP Apache-2.0
Mattermost#
Platform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).
★33470 2025-08-26 Go Docker K8S AGPL-3.0 Apache-2.0
MiAOU#
Multi-room persistent chat server.
Mumble#
Low-latency, high quality voice/text chat software.
★7157 2025-08-25 C++ deb BSD-3-Clause
Notifo#
Multichannel notification server with support for Email, Mobile Push, Web Push, SMS, messaging and a javascript plugin.
Novu#
Notification infrastructure for developers.
ntfy#
Push notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify.
Website Source Code Clients Demo
★25874 2025-08-25 Go Docker K8S Apache-2.0 GPL-2.0
One Time Secret#
Share sensitive information securely with self-destructing links that are only viewable once.
OTS#
One-Time-Secret sharing platform with a symmetric 256bit AES encryption in the browser.
★612 2025-08-25 Go Apache-2.0
PushBits#
Notification server for relaying push notifications via Matrix, similar to PushBullet and Gotify.
Revolt#
Revolt is a user-first chat platform built with modern web technologies.
Rocket.Chat#
Communications platform that puts data protection first (alternative to Gitter.im and Slack).
SAMA#
Next-Gen self-hosted chat server and clients.
Website Source Code Clients Demo
Screego#
Screego is a simple tool to quickly share your screen to one or multiple people via web browser.
Shhh#
Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates.
SimpleX Chat#
The most private and secure chat and applications platform - now with double ratchet E2E encryption.
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.
Synapse#
Server for Matrix, an open standard for decentralized persistent communication.
★2838 2025-08-26 Python deb Apache-2.0
Syndie#
Syndie is a libre system for operating distributed forums.
Tailchat#
Next generation noIM application in your own workspace, not only another Slack/Discord/rocket.chat.
★3384 2025-04-12 Docker K8S Nodejs Apache-2.0
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).
Tinode#
Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots.
Tox#
Distributed, secure messenger with audio and video chat capabilities.
Typebot#
Conversational app builder (alternative to Typeform and Landbot).
WBO#
Web Whiteboard to collaborate in real-time on schemas, drawings, and notes.
Zulip#
Zulip is a powerful, open source group chat application.
★23327 2025-08-26 Python Apache-2.0