ReactiveX / RxJava

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

netty / netty

Netty project - an event-driven asynchronous network application framework

AsyncHttpClient / async-http-client

Asynchronous, non-blocking HTTP & WebSocket client for the JVM

redis / lettuce

Redis Java client

reactor / reactor-core

Non-Blocking Reactive Foundation for the JVM

zeromq / jeromq

JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.

YeautyYE / netty-websocket-spring-boot-starter

:rocket: lightweight high-performance WebSocket framework （ 轻量级、高性能的WebSocket框架）

agents-flex / agents-flex

Agents-flex is A lightweight Java AI agent development framework (positioned as a counterpart to Spring AI). It supports features such as RAG, MCP, Skills, Text2SQL , LLM Wiki, Sub-agents, Web Search, TTS (synchronous and streaming), and STT.

smallrye / smallrye-mutiny

An Intuitive Event-Driven Reactive Programming Library for Java

KirstenAli / nitromap

A zero-dependency embedded Java record store that adds asynchronous persistence, SQL-like querying, and shared-nothing clustering to the familiar ConcurrentHashMap API.