Caprine is an unofficial and privacy focused Facebook Messenger app with many useful features. It has support for Work Chat: Messenger for Workplace, You can send code blocks by using Markdown syntax. It is built with Electron framework.

Caprine - Elegant Facebook Messenger Desktop App

Slackin is a little server that enables public access to Slack server. It is like Freenode but on Slack.

Slackin - Public Slack organizations made easy

The Lounge is a self-hosted web IRC client. It supports Push notifications, link previews, file uploads, Stay always connected to IRC servers while you are offline. Forget about bouncers. Resume where you left off on any device. The client works smoothly on every desktop, smartphone and tablet.

The Lounge - Modern, responsive, cross-platform, self-hosted web IRC client

Gitter is designed to make community messaging, collaboration and discovery as smooth and simple as possible. You can easily create, organise and grow your communities, inviting others to join just in one click. Gitter is an instant messaging and chat room system for developers and users of GitHub repositories. Gitter is similar to IRC and Slack. Unlike IRC, and like Slack, it automatically logs all messages in the cloud.

Gitter - Community for Software Developers

Sulla is a javascript library which provides a high-level API control to Whatsapp so it can be configured to automatize resposes or any data that goes trough Whatsapp effortlessly. By default sulla will try to use Google Chrome driver if installed, if not, it will use integrated Chromium instance





Sulla - Javascript Whatsapp api library for chatbots

Let's Chat is a persistent messaging application that runs on Node.js and MongoDB. It's designed to be easily deployable and fits well with small, intimate teams. It supports XMPP Multi-user chat (MUC), Multiple rooms, File uploads and lot more.

Lets-Chat - Self-hosted chat for small teams

Smooch is the best way to have personal, rich conversations with people on your website or customers on any device. The Smooch Web Messenger will add live web messaging to your website or web app. Customers will be able to talk to you from your website, while you manage conversations using your favorite business systems.

Smooch - Live web messaging to your website or web app

Simple encrypted web chat. Powered by socket.io, the web cryptography API. This project is an example of how client side encryption works and how you can integrate it as a chat service. Darkwire server is a Node.js application that requires redis. The Darkwire.io web client is written in JavaScript with React JS and Redux. It uses a combination of asymmetric encryption (RSA-OAEP), symmetric session keys (AES-CBC) and signing keys (HMAC) for security.

Darkwire.io -  End-to-end encrypted instant web chat

Friends is like Slack except P2P, offline friendly and open source. Data is transmitted over secure channels and messages are authenticated. It is made by a group of open source developers who are motivated to make a public chat platform that is easy to use but isn't centrally controlled, and where data is owned by its users. 

Friends - P2P chat powered by the web

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