JackJiang2011
原创全平台IM通信层框架，轻量级、高度提炼，历经10年、久经考验。可能是市面上唯一同时支持UDP+TCP+WebSocket三种协议的同类开源框架，支持 iOS、Android、Java、H5、小程序、Uniapp、鸿蒙Next，服务端基于Netty。
dunglas
🪽 An open, easy, fast, reliable and battery-efficient solution for real-time communications
Corvusoft
Corvusoft's Restbed framework brings asynchronous RESTful functionality to C++ applications.
OneSignal
React Native Library for OneSignal Push Notifications Service
vicc1024
消息推送用OnePush，就够了！
Ph3nol
Standalone PHP library for easy devices notifications push.