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