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263 stars written in Java
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Free and Open Source, Distributed, RESTful Search Engine

Java 76,606 25,863 Updated Apr 28, 2026

Ghidra is a software reverse engineering (SRE) framework

Java 67,784 7,439 Updated Apr 28, 2026

Termux - a terminal emulator application for Android OS extendible by variety of packages.

Java 54,064 6,458 Updated Apr 6, 2026

Google core libraries for Java

Java 51,497 11,144 Updated Apr 27, 2026

Free universal database tool and SQL client

Java 49,777 4,148 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

Netty project - an event-driven asynchronous network application framework

Java 34,935 16,249 Updated Apr 28, 2026

Apache Kafka - A distributed event streaming platform

Java 32,474 15,148 Updated Apr 28, 2026

Apache Flink

Java 25,965 13,923 Updated Apr 28, 2026

FASTJSON 2.0.x has been released, faster and more secure, recommend you upgrade.

Java 25,674 6,433 Updated Jul 16, 2024

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

Java 25,346 4,450 Updated Apr 28, 2026

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

Java 21,569 1,790 Updated Apr 28, 2026

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Java 18,844 3,440 Updated Feb 16, 2026

High Performance Inter-Thread Messaging Library

Java 18,315 3,968 Updated Apr 2, 2025

Zipkin is a distributed tracing system

Java 17,434 3,103 Updated Apr 8, 2026

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

Java 16,898 1,564 Updated Apr 28, 2026

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

Java 16,698 5,531 Updated Apr 28, 2026

Graphs for Everyone

Java 16,391 2,597 Updated Apr 23, 2026

Quarkus: Supersonic Subatomic Java.

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

Apache Pulsar - distributed pub-sub messaging system

Java 15,215 3,729 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

Suite of tools for deploying and training deep learning models using the JVM. Highlights include model import for keras, tensorflow, and onnx/pytorch, a modular and tiny c++ library for running mat…

Java 14,226 3,840 Updated Apr 2, 2026

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

Java 14,013 2,443 Updated Apr 27, 2026

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

Java 13,983 3,776 Updated Apr 27, 2026

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

Java 12,762 3,582 Updated Apr 28, 2026

Apache ZooKeeper

Java 12,759 7,322 Updated Apr 28, 2026

AWS Service registry for resilient mid-tier load balancing and failover.

Java 12,703 3,779 Updated Mar 23, 2026

Change data capture for a variety of databases. Please log issues at https://github.com/debezium/dbz/issues.

Java 12,664 2,918 Updated Apr 28, 2026

The Java gRPC implementation. HTTP/2 based RPC

Java 12,007 3,985 Updated Apr 28, 2026

Flyway by Redgate • Database Migrations Made Easy.

Java 9,728 1,608 Updated Apr 27, 2026
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