Telegram Desktop messaging app
The first messaging platform operating without user identifiers
Private messenger for Windows, Mac, and Linux
A Decentralized, Onion Routed, Private Messenger
Elegant Facebook Messenger desktop app
WhatsApp library for NodeJS that connects through the browser app
A New Kind of Instant Messaging
A reference implementation of the SimpleX Messaging Protocol
Open source machine learning framework to automate text conversations
Franz is a free messaging app for services like WhatsApp, Slack, etc,
In-memory message queue with an Amazon SQS-compatible interface
A Tox-based instant messaging and video chat client
LXMF client for Android, Linux and macOS to communicate with people
Python chatbot framework with Natural Language Understanding
A free (libre) open source, mobile OS for Ethereum
Telegraph is a Laravel package for fluently interacting with Telegram
Modern XMPP ("Jabber") Chat Client using GTK/Vala
Distributed instant messaging system for developers
Home to the Signal Protocol and other cryptographic primitives
A universal instant messaging (IM) program
You can message and share files inside your intranet without a server.
Development toolkit for Web Services and XML data bindings for C & C++
A GNU/Linux operating system accessible for visually impaired.
URL filter to block unwanted content on the internet
PHP & MySQL based CMS with messenger