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45 stars written in Java
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IntelliJ IDEA & IntelliJ Platform

Java 19,956 5,781 Updated Apr 11, 2026

A configuration as code language with rich validation and tooling.

Java 11,232 369 Updated Apr 9, 2026

A barebones WebSocket client and server implementation written in 100% Java.

Java 10,796 2,592 Updated Jan 13, 2026

AutoMQ is a diskless Kafka® on S3. 10x Cost-Effective. No Cross-AZ Traffic Cost. Autoscale in seconds. Single-digit ms latency. Multi-AZ Availability.

Java 9,685 684 Updated Apr 11, 2026

Java Native Access

Java 8,910 1,682 Updated Jan 1, 2026

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

Java 8,578 1,025 Updated Apr 11, 2026

Haven is for people who need a way to protect their personal spaces and possessions without compromising their own privacy, through an Android app and on-device sensors

Java 6,787 749 Updated Oct 26, 2022

Fork of tagtraum industries' GCViewer. Tagtraum stopped development in 2008, I aim to improve support for Sun's / Oracle's java 1.6+ garbage collector logs (including G1 collector)

Java 4,635 993 Updated Dec 6, 2025

Fibers, Channels and Actors for the JVM

Java 4,563 567 Updated Jan 21, 2024

Official GeoServer repository

Java 4,317 2,289 Updated Apr 10, 2026

Open Location Code is a library to generate short codes, called "plus codes", that can be used as digital addresses where street addresses don't exist.

Java 4,308 520 Updated Mar 30, 2026
Java 3,819 586 Updated Apr 2, 2026

Simple Binary Encoding (SBE) - High Performance Message Codec

Java 3,425 573 Updated Apr 7, 2026

The reliable, generic, fast and flexible logging framework for Java.

Java 3,215 1,355 Updated Apr 10, 2026

Jenkins Configuration as Code Plugin

Java 2,784 750 Updated Apr 11, 2026

jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functional…

Java 2,124 172 Updated Aug 1, 2024

Command line parsing framework for Java

Java 2,025 340 Updated Dec 3, 2025

A 2D chart library for Java applications (JavaFX, Swing or server-side).

Java 1,375 625 Updated Nov 22, 2025

Java Indexed Record Chronicle

Java 1,223 191 Updated Oct 12, 2020

ZeroTurnaround Process Executor

Java 912 112 Updated Jul 12, 2025

Android keyboard for secure E2EE communication through the signal protocol in any messenger. Communicate securely and independent, regardless of the legal situation or whether messengers use E2EE

Java 855 40 Updated Apr 21, 2024

A Java event based WebSocket and HTTP server

Java 820 181 Updated Dec 17, 2023

A Low Garbage Java Serialisation Library that supports multiple formats

Java 584 133 Updated Mar 30, 2026
Java 462 108 Updated Mar 24, 2023

Application Insights for Java

Java 322 210 Updated Apr 9, 2026

Maven/Gradle alternative with a twist: its a single Java file! Edit it to configure your project.

Java 225 5 Updated Mar 6, 2026

CoralRing is an ultra-low-latency, lock-free, garbage-free, batching and concurrent circular queue (ring) in off-heap shared memory for inter-process communication (IPC) in Java across different JV…

Java 216 13 Updated Jan 21, 2026

Lightweight Durable Java Workflows

Java 198 13 Updated Apr 10, 2026

Offheap Java POJOs with guaranteed memory alignment

Java 193 25 Updated Jul 30, 2013

Say goodbye to checked exceptions forever.

Java 137 Updated Aug 4, 2023
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