Reactive Streams GitHub Repositories (2026) · Open Source Tools

🏎️ Streams & Reactive Programming paradigm for Go: declarative and composable API for event-driven applications

An Intuitive Event-Driven Reactive Programming Library for Java

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Non-Blocking Reactive Foundation for the JVM

TCP/HTTP/UDP/QUIC client/server with Reactor over Netty

Spring Reactive playground

HiveMQ MQTT Client is an MQTT 5.0 and MQTT 3.1.1 compatible and feature-rich high-performance Java client library with different API flavours and backpressure support

RxJava 4.x extra sources, operators and components and ports of many 1.x companion libraries.

Microservices library - scalecube-services is a high throughput, low latency reactive microservices library built to scale. It features: API-Gateways, service-discovery, service-load-balancing, the architecture supports plug-and-play service communication modules and features. built to provide performance and low-latency real-time stream-processing

Additional optional modules for the Reactor project

R2DBC Proxying Framework

A networking framework that evolves with your application