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82 stars written in Java
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Ghidra is a software reverse engineering (SRE) framework

Java 64,015 7,113 Updated Feb 2, 2026

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

Java 48,524 7,606 Updated Jan 30, 2026

A powerful ๐Ÿš€ Android chart view / graph view library, supporting line- bar- pie- radar- bubble- and candlestick charts as well as scaling, panning and animations.

Java 38,213 9,056 Updated Jun 5, 2025

Mirror of Apache Kafka

Java 31,817 14,939 Updated Feb 2, 2026

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

Java 25,735 7,377 Updated Feb 3, 2026

High Performance Inter-Thread Messaging Library

Java 18,206 3,963 Updated Apr 2, 2025

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

Java 16,640 5,518 Updated Feb 2, 2026

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

Java 16,635 1,532 Updated Feb 3, 2026

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

Java 13,928 3,770 Updated Feb 2, 2026

๐Ÿ”Ž Open source distributed and RESTful search engine.

Java 12,319 2,391 Updated Feb 3, 2026

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

Java 8,426 1,003 Updated Jan 30, 2026

๐Ÿ“ˆ Capturing JVM- and application-level metrics. So you know what's going on.

Java 7,853 1,802 Updated Feb 2, 2026

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

Java 7,514 2,249 Updated Jan 30, 2026

Socket.IO server implemented on Java. Realtime java framework

Java 7,023 1,679 Updated Mar 19, 2025

A Java to iOS Objective-C translation tool and runtime.

Java 6,035 994 Updated Feb 2, 2026

Ribbon is a Inter Process Communication (remote procedure calls) library with built in software load balancers. The primary usage model involves REST calls with various serialization scheme support.

Java 4,624 1,238 Updated Dec 17, 2025

Fibers, Channels and Actors for the JVM

Java 4,571 569 Updated Jan 21, 2024

High performance non-blocking webserver

Java 3,748 1,056 Updated Jan 30, 2026

Actor Messaging platform

Java 3,266 728 Updated Nov 9, 2021

BinNavi is a binary analysis IDE that allows to inspect, navigate, edit and annotate control flow graphs and call graphs of disassembled code.

Java 2,895 458 Updated Oct 23, 2020

A surgical debugging tool to uncover the layers under your app.

Java 2,767 231 Updated Feb 28, 2020

An open source clone of Amazon's Dynamo.

Java 2,682 585 Updated Jul 24, 2023

A system for distributing and managing secrets

Java 2,625 213 Updated Sep 18, 2023

Apache Flume is a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log-like data

Java 2,558 1,557 Updated Oct 10, 2024

Logback JSON encoder and appenders

Java 2,521 413 Updated Jan 26, 2026

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

Java 2,442 490 Updated Nov 30, 2025

Java MQTT lightweight broker

Java 2,435 834 Updated Jan 26, 2026

Please visit https://github.com/h2oai/h2o-3 for latest H2O

Java 2,328 556 Updated Oct 24, 2024

A high performance replicated log service. (The development is moved to Apache Incubator)

Java 2,209 284 Updated Feb 25, 2020

Smithy is a protocol-agnostic interface definition language and set of tools for generating clients, servers, and documentation for any programming language.

Java 2,194 244 Updated Feb 2, 2026
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