General IM UI components. Android/iOS/RectNative ready. 通用 IM 聊天 UI 组件，已经同时支持 Android/iOS/RN。

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

🕊️ The world's most advanced open source instant messaging engine for 100K~10M concurrent users https://turms-im.github.io/docs

Chat SDK Android - Open Source Mobile Messenger

IM server based on netty. Provides a client jar. Integrate with your own login system.基于netty实现的IM服务端,提供客户端jar包,可集成自己的登录系统

Tinode chat client application for Android

a simple and small push system for Android and server based on Netty.

基于网易云信 IM SDK for Android，界面仿造QQ和微信，打造的一款简单的即时通讯 APP，目前可实现好友添加，个人资料修改，基础聊天功能（包括文字，表情，语音，视频，图片和位置信息发送接收功能），Based on Netease cloud letter IM SDK for Android, the interface mimics QQ and WeChat, to create a simple instant messaging APP, which can be realized by adding friends, modifying personal information, basic chatting functions (including text…

📶即时消息推送服务(即时通讯)，基于Netty- Instant Messaging push service based on Netty

A simple, beautiful, mobile-first instant messaging progressive web application.

即时聊天，自带服务器，有朋友圈功能等等

android client

A WebChat Room in LAN writing by Java. ---非常简单的网络聊天室，Java语言实现。

Using Netty as the server and WebSocket as the communication protocol, the instant messaging system developed by microservice architecture is adopted.

(M) Android XMPP Client

iGap Client for Android Source Code

企业IM即时通讯定制平台，百万级高并发、高性能、可扩展、安全、高交互体验的企业通信和协作im平台。包含通讯服务、客户端（PC、Android、iOS）、Web门户（用于集成企业应用）、WebAPI。

Build chat in minutes with Sendbird UIKit open source code and samples.

Java XMPP client library