There are 66 repositories under messaging topic.
A realtime distributed messaging platform
Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.
High-Performance server for NATS.io, the cloud and edge native messaging system.
Apache Pulsar - distributed pub-sub messaging system
The most scalable open-source MQTT broker for IoT, IIoT, and connected vehicles
An elegant messages UI library for iOS
Open source RabbitMQ: core server and tier 1 (built-in) plugins
Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots
ZeroMQ core engine in C++, implements ZMTP/3.1
Scalable real-time messaging server in a language-agnostic way. Set up once and forever.
Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
A community-driven replacement for JSQMessagesViewController
Distributed Application Framework for .NET
Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)
Kafka implemented in Golang with built-in coordination (No ZK dep, single binary install, Cloud Native)
Open source alternative communication platform.
qTox is a chat, voice, video, and file transfer IM client using the encrypted peer-to-peer Tox protocol.
Franz is a free messaging app for services like WhatsApp, Slack, Messenger and many more.
The most widely used PHP client for RabbitMQ
The most beautiful SMS messenger for Android
⚡️ A framework for building conversational user interfaces.
Apache Kafka® running on Kubernetes
Anonymous peer-to-peer instant messaging
Apache Heron (Incubating) is a realtime, distributed, fault-tolerant stream processing engine from Twitter
Android library. Flexible components for chat UI implementation with flexible possibilities for styling, customizing and data management. Made by Stfalcon
Orchestrate end-to-end encryption, cryptographic identities, mutual authentication, and authorization policies between distributed applications – at massive scale. Use Ockam to build secure-by-design applications that can Trust Data-in-Motion.
SimpleX - the first messaging platform operating without user identifiers of any kind - 100% private by design! iOS and Android apps are released 📱!
ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.
A distributed MQTT message broker based on Erlang/OTP. Built for high quality & Industrial use cases.
A 100% native C# implementation of ZeroMQ for .NET
signal-cli provides an unofficial commandline, dbus and JSON-RPC interface for the Signal messenger.
Messaging library for Python.