NationalSecurityAgency / ghidra

Ghidra is a software reverse engineering (SRE) framework

iBotPeaches / Apktool

A tool for reverse engineering Android apk files

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.

elastic / elasticsearch

Free and Open Source, Distributed, RESTful Search Engine

doocs / advanced-java

😮 Core Interview Questions & Answers For Experienced Java(Backend) Developers | 互联网 Java 工程师进阶知识完全扫盲：涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识

halo-dev / halo

Halo 是一款强大易用的开源建站工具，从个人博客、知识库，到企业官网、在线商城，Halo 都能助您轻松实现，一站式满足您的多样化建站需求。

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

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

alibaba / spring-cloud-alibaba

Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.

libgdx / libgdx

Desktop/Android/HTML5/iOS Java game development framework

apache / skywalking

APM, Application Performance Monitoring System

apache / rocketmq

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

CarGuo / GSYVideoPlayer

Video players (IJKplayer, ExoPlayer, MediaPlayer), HTTPS, 16k page size, danmaku (bullet chat) support, external subtitles, support for filters, watermarks, and GIF screenshots, pre-roll and mid-roll ads, multiple simultaneous playback, basic seeking/dragging, volume and brightness adjustment, play-while-cache support

APIJSON / APIJSON

🏆 Real-Time no-code, powerful and secure ORM 🚀 providing APIs and Docs without coding by Backend, and Frontend(Client) can customize response JSONs 🏆 实时 零代码、全功能、强安全 ORM 库 🚀 后端接口和文档零代码，前端(客户端) 定制返回 JSON 的数据和结构

prestodb / presto

The official home of the Presto distributed SQL query engine for big data

apache / doris

Apache Doris is a real-time analytics and hybrid search database for AI agents.

apache / pulsar

Apache Pulsar - distributed pub-sub messaging system

supertokens / supertokens-core

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

microg / GmsCore

Free implementation of Play Services

elastic / logstash

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

GoogleContainerTools / jib

🏗 Build container images for your Java applications.

opensearch-project / OpenSearch

🔎 Open source distributed and RESTful search engine.

trinodb / trino

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

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.

pagehelper-org / Mybatis-PageHelper

Mybatis通用分页插件

StarRocks / starrocks

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.

asLody / VirtualApp

Virtual Engine for Android(Support 14.0 in business version)

alibaba / spring-ai-alibaba

Agentic AI Framework for Java Developers

Activiti / Activiti

Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.

flowable / flowable-engine

A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.

spring-projects / spring-ai

An Application Framework for AI Engineering

aeron-io / aeron

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

iflytek / astron-agent

Enterprise-grade, commercial-friendly agentic workflow platform for building next-generation SuperAgents.

google / tsunami-security-scanner

Tsunami is a general purpose network security scanner with an extensible plugin system for detecting high severity vulnerabilities with high confidence.

Graylog2 / graylog2-server

Free and open log management

dependency-check / DependencyCheck

OWASP dependency-check is a software composition analysis utility that detects publicly disclosed vulnerabilities in application dependencies.

Col-E / Recaf

The modern Java bytecode editor

zhukunpenglinyutong / jetbrains-cc-gui

Jetbrains Claude Code and Codex GUI Plugin

vespa-engine / vespa

The AI search platform

graphhopper / graphhopper

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

jetlinks / jetlinks-community

JetLinks 基于Java,Spring Boot ,WebFlux,Netty,Vert.x,Reactor等开发, 是一个全响应式的企业级物联网平台。支持统一物模型管理,多种设备,多种厂家,统一管理。统一设备连接管理,多协议适配(TCP,MQTT,UDP,CoAP,HTTP等),屏蔽网络编程复杂性,灵活接入不同厂家不同协议等设备。实时数据处理,设备告警,消息通知,数据转发。地理位置,数据可视化等。能帮助你快速建立物联网相关业务系统。

haifengl / smile

Statistical Machine Intelligence & Learning Engine

apache / incubator-kie

Apache KIE (Knowledge Is Everything) is the home of Drools, OptaPlanner, jBPM, and Kogito.

strimzi / strimzi-kafka-operator

Apache Kafka® running on Kubernetes

CaffeineMC / sodium

A high-performance rendering engine replacement for Minecraft, which greatly improves frame rates and reduces micro-stutter

bethington / ghidra-mcp

Ghidra MCP Server — 200+ MCP tools for AI-powered reverse engineering. GUI plugin + headless server, lazy tool loading, convention enforcement, batch operations, Ghidra Server integration, and Docker deployment.

diffplug / spotless

Keep your code spotless

iflytek / skillhub

Self-hosted, open-source agent skill registry for enterprises. Publish & version skill packages, govern with RBAC and audit logs, deploy on-premise with Docker or Kubernetes.

tianshiyeben / wgcloud

Linux运维监控工具，支持系统硬件信息，内存，CPU，温度，磁盘空间及IO，硬盘smart，GPU，防火墙，网络流量速率等监控，服务接口监测，大屏展示，拓扑图，端口监控，进程监控，docker监控，日志监控，文件防篡改，数据库监控，指令批量下发执行，web ssh，Linux面板(探针)，告警，SNMP监测，K8S，Redis，Nginx，Kafka，资产管理，计划任务，密码管理，工作笔记

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.

jankotek / mapdb

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

oracle / opengrok

OpenGrok is a fast and usable source code search and cross reference engine, written in Java

mock-server / mockserver-monorepo

MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.

AsamK / signal-cli

signal-cli provides an unofficial commandline, JSON-RPC and dbus interface for the Signal messenger.

deepjavalibrary / djl

An Engine-Agnostic Deep Learning Framework in Java

JabRef / jabref

Desktop app for managing BibTeX and BibLaTeX (.bib) libraries

ant-media / Ant-Media-Server

Ant Media Server — Ultra-low latency streaming engine with WebRTC (~0.5s), SRT, RTMP, HLS, CMAF, adaptive bitrate, transcoding & scaling

SPLWare / esProc

esProc SPL is a JVM-based programming language designed for structured data computation, serving as both a data analysis tool and an embedded computing engine.

s4kibs4mi / java-developer-roadmap

Roadmap to becoming a Java developer in 2026

JetBrains / fernflower

Decompiler from Java bytecode to Java, used in IntelliJ IDEA.