Telegram Desktop messaging app
The first messaging platform operating without user identifiers
Private messenger for Windows, Mac, and Linux
Elegant Facebook Messenger desktop app
WhatsApp library for NodeJS that connects through the browser app
A Decentralized, Onion Routed, Private Messenger
Franz is a free messaging app for services like WhatsApp, Slack, etc,
Open source machine learning framework to automate text conversations
A New Kind of Instant Messaging
In-memory message queue with an Amazon SQS-compatible interface
A reference implementation of the SimpleX Messaging Protocol
A Tox-based instant messaging and video chat client
Python chatbot framework with Natural Language Understanding
LXMF client for Android, Linux and macOS to communicate with people
Telegraph is a Laravel package for fluently interacting with Telegram
A free (libre) open source, mobile OS for Ethereum
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