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

Java 66,499 7,318 Updated Apr 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 48,437 7,601 Updated Apr 2, 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 38,231 9,044 Updated Jun 5, 2025

Apache Kafka - A distributed event streaming platform

Java 32,272 15,076 Updated Apr 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 26,058 7,467 Updated Apr 2, 2026

High Performance Inter-Thread Messaging Library

Java 18,276 3,960 Updated Apr 2, 2025

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

Java 16,816 1,556 Updated Apr 2, 2026

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

Java 16,677 5,533 Updated Apr 2, 2026

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

Java 13,968 3,774 Updated Apr 2, 2026

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

Java 12,684 2,496 Updated Apr 2, 2026

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

Java 8,547 1,020 Updated Apr 2, 2026

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

Java 7,849 1,793 Updated Mar 30, 2026

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

Java 7,523 2,247 Updated Apr 2, 2026

Socket.IO server implemented on Java. Realtime java framework

Java 7,026 1,674 Updated Feb 4, 2026

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

Java 6,046 999 Updated Apr 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 4,617 1,234 Updated Dec 17, 2025

Fibers, Channels and Actors for the JVM

Java 4,564 567 Updated Jan 21, 2024

High performance non-blocking webserver

Java 3,742 1,054 Updated Mar 24, 2026

Actor Messaging platform

Java 3,264 726 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 2,891 457 Updated Oct 23, 2020

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

Java 2,764 231 Updated Feb 28, 2020

An open source clone of Amazon's Dynamo.

Java 2,681 583 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 2,559 1,549 Updated Oct 10, 2024

Logback JSON encoder and appenders

Java 2,522 416 Updated Mar 3, 2026

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

Java 2,443 490 Updated Nov 30, 2025

Java MQTT lightweight broker

Java 2,440 832 Updated Mar 28, 2026

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

Java 2,316 553 Updated Oct 24, 2024

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

Java 2,231 244 Updated Apr 1, 2026

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

Java 2,208 284 Updated Feb 25, 2020
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