apache / kafka

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

ToomRamcharan / tv-vibehack

Reverse-engineer any Android TV / Google TV: 100% fail-safe direct boot launcher, remote hotkey remapping, Realtek hardware passthrough & offline media player.

langchain4j / langchain4j

LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.

nzymeorg / nzyme

WiFi, Bluetooth and Ethernet Threat Detection.

LiteLDev / LeviLaunchroid

A launcher designed for Minecraft Bedrock Edition on Android

JHR-deve / Nrfr-Android17

免 Root 修改系统报告的 SIM 国家码，支持双卡设置与还原，修复 Android 17 保存失败。

ReactiveX / RxJava

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

reactor / reactor-core

Non-Blocking Reactive Foundation for the JVM

researchxxl / syncthing-android

Syncthing-Fork - A Syncthing Wrapper for Android.

GrimAnticheat / Grim

Fully async, multithreaded, predictive, open source, 3.01 reach, 1.005 timer, 0.01% speed, 99.99% antikb, "bypassable" 1.8-1.21 minecraft anticheat.

higress-group / himarket

HiMarket is an enterprise-level "AI Capability Marketplace and Developer Ecosystem Hub." It is not merely a simple aggregation of traditional APIs, but rather a comprehensive platform that packages, publishes, manages, and operates core AI assets such as enterprise Model APIs, MCP Servers, Agent APIs, etc., through standardized product formats.

devlive-community / metaforge

DataCap is integrated software for data transformation, integration, and visualization. Support a variety of data sources, file types, big data related database, relational database, NoSQL database, etc. Through the software can realize the management of multiple data sources, the data under the source of various operations conversion ...

netty / netty

Netty project - an event-driven asynchronous network application framework

graphhopper / graphhopper

Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.

AsyncHttpClient / async-http-client

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

redis / lettuce

Redis Java client

line / armeria

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.

OpenHFT / Chronicle-Queue

Micro second messaging that stores everything to disk

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.

eclipse-openj9 / openj9

Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.

apache / linkis

Apache Linkis builds a computation middleware layer to facilitate connection, governance and orchestration between the upper applications and the underlying data engines.

chriswhocodes / jitwatch

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.

OpenHFT / Chronicle-Map

Replicate your Key Value Store across your network, with consistency, persistance and performance.

BlueMap-Minecraft / BlueMap

A Minecraft mapping tool that creates 3D models of your Minecraft worlds and displays them in a web viewer.

bonigarcia / webdrivermanager

Automated driver management and other helper features for Selenium WebDriver in Java

zeromq / jeromq

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

GIScience / openrouteservice

🌍 The open source route planner api with plenty of features.

openmrs / openmrs-core

OpenMRS API and web application code

YeautyYE / netty-websocket-spring-boot-starter

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

OpenHFT / Java-Thread-Affinity

Bind a java thread to a given core

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.

reactor / BlockHound

Java agent to detect blocking calls from non-blocking threads.

moyangzhan / langchain4j-aideepin

AI 应用平台（聊天、绘画、知识库、工作流、 MCP服务市场、语音输入输出、长期记忆） | AI application platform (Chat,Draw,RAG,Workflow,MCP marketplace, ASR,TTS, Long-term memory etc)

potato-security / PotatoTool

这款工具是一款功能强大的网络安全综合工具，旨在为安全从业者、红蓝对抗人员和网络安全爱好者提供全面的网络安全解决方案。它集成了多种实用功能，包括解密、分析、扫描、溯源等，为用户提供了便捷的操作界面和丰富的功能选择。This tool offers robust network security solutions for professionals and enthusiasts. With features like decryption, analysis, scanning, and traceability, it provides a user-friendly interface and diverse functionality.

dromara / skyeye

智能办公OA系统[SpringBoot2-快速开发平台]，适用于医院，学校，中小型企业等机构的管理。Activiti5.22+动态表单实现零java代码即可做到复杂业务的流程实施，同时包含文件在线操作、日志、考勤、CRM、ERP进销存、项目、拖拽式生成问卷、日程、笔记、计划、行政等多种复杂业务功能。同时，可进行授权二开。

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.

oldratlee / fucking-java-concurrency

🎏 Simple showcases of java concurrency problems, seeing 🙈 is believing 🐵

microsoft / mssql-jdbc

The Microsoft JDBC Driver for SQL Server is a Type 4 JDBC driver that provides database connectivity with SQL Server through the standard JDBC application program interfaces (APIs).

marcosbarbero / spring-cloud-zuul-ratelimit

Rate limit auto-configure for Spring Cloud Netflix Zuul

getrebuild / rebuild

最新版全面支持AI智能！通过自然语言操作业务数据，支持 Skills/工具/知识库/MCP。高度可配置化的国产企业管理系统，企业内部可免费商用！零代码/低代码快速搭建WMS库存管理、MES生产报工、CRM客户管理、HRM人事管理，以及 TMS/ERP 等

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

dromara / Omega-AI

Omega-AI is a Java-based deep learning framework that helps you quickly build neural networks for inference and training. Its engine supports automatic differentiation, multithreading, and GPU acceleration with CUDA and cuDNN.

GoogleChrome / android-browser-helper

The Android Browser Helper library helps developers use Custom Tabs and Trusted Web Activities on top of the AndroidX browser support library.

RelativityMC / C2ME-fabric

A Fabric mod designed to improve the chunk performance of Minecraft.

fanyong920 / jvppeteer

Java API For Chrome and Firefox

tordanik / OSM2World

converter that creates three-dimensional models of the world from OpenStreetMap data

hrldcpr / pcollections

A Persistent Java Collections Library

devoxx / DevoxxGenieIDEAPlugin

DevoxxGenie is an agentic plugin for IntelliJ IDEA that uses local LLM's (Ollama, LMStudio, GPT4All, Jan and Llama.cpp) and Cloud based LLMs to help review, test, explain your project code. Latest version now also supports Spec Driven Development with CLI Runners.

pivovarit / parallel-collectors

Parallel Collectors is a toolkit easing parallel collection processing in Java using Stream API.

Ahoo-Wang / CosId

Universal, flexible, high-performance distributed ID generator. | 通用、灵活、高性能的分布式 ID 生成器

OpenHFT / Chronicle-Core

Low level access to native memory, JVM and OS.

scalecube / scalecube-services

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

easymock / objenesis

Okay, it's pretty easy to instantiate objects in Java through standard reflection. However there are many cases where you need to go beyond what reflection provides. For example, if there's no public constructor, you want to bypass the constructor code, or set final fields. There are numerous clever (but fiddly) approaches to getting around this and this library provides a simple way to get at them. You will find the official site here.

s-andrews / FastQC

A quality control analysis tool for high throughput sequencing data

OpenHFT / Chronicle-Wire

A Low Garbage Java Serialisation Library that supports multiple formats

microsoft / Generative-AI-for-beginners-java

Learn Generative AI fundamentals through Java programming.

ThreeTen / threetenbp

Backport of functionality based on JSR-310 to Java SE 6 and 7. This is NOT an implementation of JSR-310.

irockel / tda

TDA - Thread Dump Analyzer (for Java). Analyze your Thread Dumps with a GUI or use it as MCP Server.