ashishps1 / awesome-system-design-resources
Learn System Design concepts and prepare for interviews using free resources.
ashishps1 / awesome-system-design-resources
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
apache / dubbo
The java implementation of Apache Dubbo. An RPC and microservice framework.
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。
SeleniumHQ / selenium
A browser automation framework and ecosystem.
conductor-oss / conductor
Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents
apolloconfig / apollo
Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.
bazelbuild / bazel
a fast, scalable, multi-language and extensible build system
apache / skywalking
APM, Application Performance Monitoring System
apache / pulsar
Apache Pulsar - distributed pub-sub messaging system
pinpoint-apm / pinpoint
APM, (Application Performance Management) tool for large-scale distributed systems.
trinodb / trino
Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)
apache / zookeeper
Apache ZooKeeper
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.
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.
apache / hertzbeat
An AI-powered next-generation open source real-time observability system.
pig-mesh / pig
↥ ↥ ↥ Follow for updates An RBAC permission management system based on Spring Cloud 2025, Spring Boot 4, and OAuth2.
hazelcast / hazelcast
Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
haifengl / smile
Statistical Machine Intelligence & Learning Engine
oshi / oshi
Native Operating System and Hardware Information
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
grpc-ecosystem / grpc-spring
Spring Boot starter module for gRPC framework.
Loophole-LLC / Bastillion
Bastillion gives you a clean, browser-based way to manage SSH access across all your systems—like a bastion host with a friendly dashboard.
apache / avro
Apache Avro is a data serialization system.
CodeRayZhang / Movie_Recommend
历史学习项目：Spark 电影推荐、爬虫、Web 与后台。新版持续开发见 cinematch-recommender。
88250 / symphony
🎶 一款用 Java 实现的现代化社区（论坛/问答/BBS/社交网络/博客）系统平台。A modern community (forum/Q&A/BBS/SNS/blog) system platform implemented in Java. https://ld246.com
1Panel-dev / CordysCRM
🔥 Cordys 是由飞致云匠心打造的新一代的开源 AI CRM 系统，深度融合信息化、数字化与智能化能力，支持私有化部署，全面保障企业数据安全与主权。
manifold-systems / manifold
Manifold is a Java compiler plugin, its features include Metaprogramming, Properties, Extension Methods, Operator Overloading, Templates, a Preprocessor, and more.
google / jimfs
An in-memory file system for Java
MarquezProject / marquez
Collect, aggregate, and visualize a data ecosystem's metadata
apache / gobblin
A distributed data integration framework that simplifies common aspects of big data integration such as data ingestion, replication, organization and lifecycle management for both streaming and batch data ecosystems.
webbukkit / dynmap
A set of Minecraft mods that provide a real time web-based map system for various Minecraft server implementations.
langgraph4j / langgraph4j
🚀 LangGraph for Java is a library for Graph Engineering, designed to build sophisticated AI agentic architectures within the Java ecosystem. It works seamlessly with both Langchain4j and Spring AI.
apache / bookkeeper
Apache BookKeeper - a scalable, fault tolerant and low latency storage service optimized for append-only workloads
hcoles / pitest
State of the art mutation testing system for the JVM
pinterest / teletraan
Teletraan is Pinterest's deploy system.
Netflix / genie
Distributed Big Data Orchestration Service
sqlancer / sqlancer
Automated testing to find logic and performance bugs in database systems
google / adk-java
An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.
alfio-event / alf.io
alf.io - The open source ticket reservation system for conferences, trade shows, workshops, meetups
OpenEMS / openems
OpenEMS - Open Source Energy Management System
dadoonet / fscrawler
Elasticsearch File System Crawler (FS Crawler)
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.
apache / ozone
Scalable, reliable, distributed storage system optimized for data analytics and object store workloads.
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.
apache / incubator-xtable
Apache XTable (incubating) is a cross-table converter for lakehouse table formats that facilitates interoperability across data processing systems and query engines.
booklore-app / booklore
BookLore: A self-hosted, multi-user digital library with smart shelves, auto metadata, Kobo & KOReader sync, BookDrop imports, OPDS support, and a built-in reader for EPUB, PDF, and comics.
TDuckCloud / tduck-survey-form
为企业提供「免费」表单问卷能力，「开箱即用」快速赋能业务 A questionnaire system that can be privatized and deployed - 填鸭表单问卷系统（tduck-survey-form）表单系统-问卷系统
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.
MCreator / MCreator
MCreator is an open-source software used to make Minecraft Java Edition mods, Minecraft Bedrock Edition Add-Ons, resource packs, and data packs using an intuitive easy-to-learn interface or with an integrated code editor. It is used worldwide by Minecraft players, aspiring mod developers, for education, online classes, and STEM workshops.
apache / amoro
Apache Amoro(incubating) is a Lakehouse management system built on open data lake formats.
quickfix-j / quickfixj
QuickFIX/J is a full featured messaging engine for the FIX protocol. - This is the official project repository.
steve-community / steve
SteVe - OCPP server implementation in Java. Your trusted open-source EV charging station management system since 2013. Used by CPOs, manufacturers and developers worldwide. Managed cloud →
DSpace / DSpace
(Official) The DSpace digital asset management system that powers your Institutional Repository
apache / systemds
An open source ML system for the end-to-end data science lifecycle
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
hardcore-sushi / DroidFS
Encrypted overlay filesystems implementation for Android. Also available on Tangled.
dotCMS / core
The Visual Headless Content Management System for Enterprises
w8123 / EnterpriseAgentFramework
ReachAI企业级智能体开发平台：快速、安全完成已有业务系统智能化改造，让 AI 在 OA、ERP、CRM 等原系统中查数据、填表单、办业务。ReachAI: Quickly and securely bring AI to existing enterprise systems, enabling AI to query data, fill out forms, and execute business tasks directly within OA, ERP, CRM, and other business applications.