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79 stars written in Java
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Design patterns implemented in Java

Java 93,955 27,380 Updated Mar 20, 2026

Ghidra is a software reverse engineering (SRE) framework

Java 67,767 7,440 Updated Apr 28, 2026

Everything you need to know to get the job.

Java 64,945 12,909 Updated May 12, 2025

Dex to Java decompiler

Java 48,281 5,502 Updated Apr 27, 2026

The java implementation of Apache Dubbo. An RPC and microservice framework.

Java 41,564 26,473 Updated Apr 27, 2026

A libre lightweight streaming front-end for Android.

Java 37,923 3,550 Updated Apr 27, 2026

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

Java 33,919 9,433 Updated Apr 20, 2026

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

Java 31,713 870 Updated Apr 28, 2026

Browse media content with your own rules on Android TV

Java 29,801 1,598 Updated Apr 27, 2026

👨‍🎓 Java Core Sprout : basic, concurrent, algorithm

Java 26,951 7,012 Updated May 21, 2024

Event Driven Orchestration & Scheduling Platform for Mission Critical Applications

Java 26,765 2,560 Updated Apr 28, 2026

🔥 Seata is an easy-to-use, high-performance, open source distributed transaction solution.

Java 25,968 8,881 Updated Apr 28, 2026

AI-driven database tool and SQL client, The hottest GUI client, supporting MySQL, Oracle, PostgreSQL, DB2, SQL Server, DB2, SQLite, H2, ClickHouse, and more.

Java 25,449 2,792 Updated Apr 25, 2026

a fast, scalable, multi-language and extensible build system

Java 25,346 4,450 Updated Apr 27, 2026

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

Java 24,459 4,696 Updated Dec 17, 2025

Open-source IoT Platform - Device management, data collection, processing and visualization.

Java 21,612 6,251 Updated Apr 28, 2026

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

Java 21,570 1,790 Updated Apr 28, 2026

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

Java 20,717 6,906 Updated Apr 28, 2026

PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.

Java 19,601 1,777 Updated Apr 28, 2026

Ip2region is an offline IP-to-Region localization library and IP data management framework with both IPv4 and IPv6 supports, 10-microsecond level query efficiency, xdb search client for many progra…

Java 18,977 2,986 Updated Apr 24, 2026

🏆 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 …

Java 18,396 2,272 Updated Apr 18, 2026

QuestDB is a high performance, open-source, time-series database

Java 16,897 1,564 Updated Apr 28, 2026

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

Java 16,698 5,530 Updated Apr 28, 2026

Apache Pulsar - distributed pub-sub messaging system

Java 15,215 3,729 Updated Apr 28, 2026

Open source alternative to Auth0 / Firebase Auth / AWS Cognito

Java 15,018 659 Updated Apr 24, 2026

Git Server with CI/CD, Kanban, and Packages. Seamless integration. Unparalleled experience.

Java 14,896 949 Updated Apr 28, 2026

Style and Grammar Checker for 25+ Languages

Java 14,419 1,505 Updated Apr 28, 2026

🏗 Build container images for your Java applications.

Java 14,378 1,468 Updated Apr 20, 2026

Apache DolphinScheduler is the modern data orchestration platform. Agile to create high performance workflow with low-code

Java 14,249 5,036 Updated Apr 28, 2026

Access your entire server infrastructure from your local desktop

Java 14,044 534 Updated Apr 28, 2026
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