Instant Messaging

SmackJava

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

chat-sdk-iosObjective-C

An open-source iOS messaging framework with Firebase and XMPP backend support for building fully-featured chat apps.

lhttpGo

A Go-based HTTP-like protocol over WebSocket for building scalable, customizable instant messaging servers.

AdiumObjective-C

An open-source instant messaging application for macOS that connects to XMPP, IRC, and multiple other services.

react-native-xmppObjective-C

A React Native library providing native XMPP client support for iOS and Android applications.

go-larkGo

A Go SDK for building chat and notification bots on Feishu and Lark Open Platform, focusing on instant messaging APIs.

Beagle IMSwift

A powerful XMPP client for macOS with file transfer, VoIP, and end-to-end encryption support.

RethinkDB ChatJavaScript

A realtime chat application built with RethinkDB and React.js for instant messaging.

SandCatRust

A real-time instant messaging application frontend built with Rust and WebRTC, featuring chat, audio/video calls, and a friend system.

vueSocketChatRoomJavaScript

A real-time chat application built with Vue.js and Socket.io supporting group and private messaging.

iGap PlusJavaScript

An open-source cross-platform messaging client for the iGap messenger platform, built with React Native.