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510 stars written in Java
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Design patterns implemented in Java

Java 93,958 27,377 Updated Mar 20, 2026

All Algorithms implemented in Java

Java 65,487 21,094 Updated Apr 27, 2026

Free universal database tool and SQL client

Java 49,780 4,149 Updated Apr 28, 2026

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

Java 48,289 7,589 Updated Apr 22, 2026

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

Java 41,567 26,471 Updated Apr 27, 2026

A libre lightweight streaming front-end for Android.

Java 37,924 3,552 Updated Apr 27, 2026

Getting Started with Spring Boot 3:

Java 37,356 53,609 Updated Apr 27, 2026

Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

Java 37,285 7,629 Updated Apr 24, 2026

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

Java 24,732 4,650 Updated Feb 21, 2024

High Performance Inter-Thread Messaging Library

Java 18,316 3,968 Updated Apr 2, 2025

A high performance caching library for Java

Java 17,624 1,685 Updated Apr 28, 2026

Zipkin is a distributed tracing system

Java 17,435 3,103 Updated Apr 8, 2026

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

Java 16,899 1,563 Updated Apr 28, 2026

Quarkus: Supersonic Subatomic Java.

Java 15,643 3,146 Updated Apr 28, 2026

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

Java 15,026 1,287 Updated Apr 28, 2026

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

Java 14,898 949 Updated Apr 28, 2026

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

Java 14,657 2,101 Updated Apr 28, 2026

MIT Deep Learning Book in PDF format (complete and parts) by Ian Goodfellow, Yoshua Bengio and Aaron Courville

Java 14,015 2,879 Updated Feb 3, 2026

Apache Druid: a high performance real-time analytics database.

Java 13,984 3,776 Updated Apr 28, 2026

APM, (Application Performance Management) tool for large-scale distributed systems.

Java 13,822 3,760 Updated Apr 28, 2026

Very spicy additions to the Java programming language.

Java 13,433 2,473 Updated Apr 21, 2026

Conductor is a microservices orchestration engine.

Java 12,771 2,330 Updated Dec 22, 2023

No clever tagline needed.

Java 12,677 1,494 Updated Apr 28, 2026

Ad-Free, New Features & Freedom

Java 12,191 326 Updated Aug 15, 2025

Resilience4j is a fault tolerance library designed for Java8 and functional programming

Java 10,646 1,453 Updated Apr 20, 2026

A simple expressive web framework for java. Spark has a kotlin DSL https://github.com/perwendel/spark-kotlin

Java 9,662 1,571 Updated Oct 8, 2023

Free and open log management

Java 8,023 1,102 Updated Apr 28, 2026

Android application powering the mirror in my house

Java 7,823 653 Updated May 28, 2023

Generate Java types from JSON or JSON Schema and annotate those types for data-binding with Jackson, Gson, etc

Java 6,374 1,676 Updated Apr 2, 2026

configuration library for JVM languages using HOCON files

Java 6,295 977 Updated Apr 28, 2026
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