Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

Event-driven networking engine written in Python.

Conversations is an open source XMPP/Jabber client for Android

Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, AIM/ICQ, IRC and many other useful features.

ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.

bridge between mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, steam, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, microsoft teams, nextcloud and more with REST API (mattermost not required!)

Web-based XMPP/Jabber chat client written in JavaScript

A XMPP server licensed under the Open Source Apache License.

A modular and portable open source XMPP client library written in Java for Android and Java (SE) VMs

Tsung is a high-performance benchmark framework for various protocols including HTTP, XMPP, LDAP, etc.

XMPP for JavaScript

Open-source XMPP client for Android

MongooseIM is a mobile messaging platform with focus on performance and scalability

JavaScript-based multi-user chat client for XMPP.

Chat SDK Android - Open Source Mobile Messenger

Modern XMPP ("Jabber") Chat Client using GTK+/Vala

Strophe.js is an XMPP library for JavaScript

Modern XMPP, with a JSON API

Movim - Decentralized social platform

【停止维护】基于Xmpp协议的即时通讯社交软件(客户端+服务端)Open source one last year to write their own Xmpp based on the agreement of the instant messaging social software (client + server)

Ncurses based XMPP client

An XMPP server written in Go (Golang).

Automated solution for hosting email, web, DNS, XMPP, and ZNC on OpenBSD.

Chat SDK iOS - Open Source Mobile Messenger

An Adapter-based Bot Framework for Elixir Applications

💬 Real-time xmpp chat application with video calls, file transfer and encrypted communication.

Kontalk official Android client

Cross-platform real-time collaboration client optimized for business and organizations.

coyim - a safe and secure chat client