apache / kafka

Distributed event streaming platform for building high-throughput data pipelines and streaming applications.

conductor-oss / conductor

Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents

kestra-io / kestra

Open-source event-driven orchestration platform for scheduling and running data, AI, and infrastructure workflows defined in YAML.

debezium / debezium

Change data capture for a variety of databases. Please log issues at https://github.com/debezium/dbz/issues.

ReactiveX / RxJava

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

apache / rocketmq

Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.

alfio-event / alf.io

alf.io - The open source ticket reservation system for conferences, trade shows, workshops, meetups

eventuate-tram / eventuate-tram-core

Transactional messaging for microservices

netty / netty

Netty project - an event-driven asynchronous network application framework

apache / pulsar

Apache Pulsar - distributed pub-sub messaging system

elastic / logstash

Logstash - transport and process your logs, events, or other data

eclipse-vertx / vert.x

Vert.x is a tool-kit for building reactive applications on the JVM

obsidiandynamics / kafdrop

Kafka Web UI

Atmosphere / atmosphere

Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.

AxonIQ / AxonFramework

Framework for Evolutionary Message-Driven Microservices on the JVM

microcks / microcks

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

jplag / JPlag

State-of-the-Art Source Code Plagiarism & Collusion Detection. Check for plagiarism in a set of programs.

apache / eventmesh

EventMesh is a new generation serverless event middleware for building distributed event-driven applications.

aklivity / zilla

🦎 A lightweight, multi-protocol gateway for event-driven applications and AI agents. Expose and govern Kafka, MQTT, APIs, and MCP through one high-performance engine with shared routing, security, schema, and observability.

hehonghui / AndroidEventBus

A lightweight eventbus library for android, simplifies communication between Activities, Fragments, Threads, Services, etc.

siddhi-io / siddhi

Stream Processing and Complex Event Processing Engine

apache / rocketmq-dashboard

The state-of-the-art Dashboard of Apache RoccketMQ provides excellent monitoring capability. Various graphs and statistics of events, performance and system information of clients and application is evidently made available to the user.

sirixdb / sirix

SirixDB is an an embeddable, bitemporal, append-only database system and event store, storing immutable lightweight snapshots. It keeps the full history of each resource. Every commit stores a space-efficient snapshot through structural sharing. It is log-structured and never overwrites data. SirixDB uses a novel page-level versioning approach.

eventuate-tram / eventuate-tram-sagas

Sagas for microservices

spring-cloud / spring-cloud-stream

Framework for building Event-Driven Microservices

smallrye / smallrye-mutiny

An Intuitive Event-Driven Reactive Programming Library for Java

retrooper / packetevents

PacketEvents is a protocol library tailored to Minecraft Java Edition, designed to facilitate the processing and transmission of packets.

bernie-g / geckolib

GeckoLib is an animation engine for Minecraft mods, with support for complex 3D keyframe-based animations, numerous easings, concurrent animation support, sound and particle keyframes, event keyframes, math-based animations, and more. Available for all major modloaders.

eventuate-local / eventuate-local

The on premise, open source version of Eventuate, which is a platform for developing transactional business applications that use the microservice architecture.

eventuate-tram / eventuate-tram-examples-customers-and-orders

An example of Choreography-based sagas in Spring Boot/JPA microservices

aws / event-ruler

Event Ruler is a Java library that allows matching many thousands of Events per second to any number of expressive and sophisticated rules.

andreschaffer / event-sourcing-cqrs-examples

Event Sourcing and CQRS in practice.

banq / jivejdon

Jivejdon is a chain notebook with DDD/CQRS/Clean architecture

eventuate-tram / eventuate-tram-sagas-examples-customers-and-orders

Spring Boot/JPA microservices that use an orchestration-based saga to maintain data consistency

icastanon / fintrack-platform

An open-source event-driven personal finance platform built with Java, Spring Boot, Spring Batch, Spring Security, PostgreSQL, Redis, Amazon SQS, React, Terraform, and AWS.

YeamimHossainSajid / Kymira

Cloud native, event driven luxury fashion discovery & headless commerce backend. Built with 20+ Spring Boot 3 microservices, Apache Kafka, Redis, PostgreSQL (DB per service), gRPC, MinIO S3, and deployed on Contabo Cloud VPS.

git-syl / hermes-agent-demo

A multi-model Agent runtime built on Spring Boot 4 / Spring AI 2.0: model routing (Anthropic / DeepSeek / OpenAI / custom), thinking toggle, Task subagents, hot-pluggable Skills, Docker sandbox + Code Interpreter, MCP tools, dify/n8n integration, RAG with pgvector, Human-in-the-Loop approvals — all streamed as structured SSE events.

hotpad100c / microtimingreplay

Record micro events in minecraft gameplay and replay it!

rohingosling / eca-rule-engine-2

Stateless ECA (Event Condition Action) Rule Engine.