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22 results for source starred repositories written in Java
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Apache ZooKeeper

Java 12,718 7,331 Updated Jan 28, 2026

RStudio is an integrated development environment (IDE) for R

Java 4,944 1,154 Updated Feb 5, 2026

Apache Avro is a data serialization system.

Java 3,216 1,726 Updated Feb 1, 2026

Apache Nutch is an extensible and scalable web crawler

Java 3,121 1,264 Updated Feb 3, 2026

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

Java 2,559 1,557 Updated Oct 10, 2024

Apache BookKeeper - a scalable, fault tolerant and low latency storage service optimized for append-only workloads

Java 1,984 961 Updated Jan 26, 2026

Machine Learning Platform and Recommendation Engine built on Kubernetes

Java 1,479 302 Updated Apr 12, 2020

Apache Commons CLI

Java 383 217 Updated Jan 28, 2026

Mirror of Apache Derby

Java 372 142 Updated Jul 8, 2022

Apache XML Graphics Batik

Java 239 152 Updated Dec 12, 2025

Prizm Cybernetic Core

Java 219 99 Updated Oct 9, 2025

Mirror of Apache Knox

Java 211 267 Updated Jan 29, 2026

Java library for adding altcoin support to bitcoinj

Java 126 91 Updated Feb 14, 2022

The Apache Gora open source framework provides an in-memory data model and persistence for big data.

Java 121 129 Updated Feb 23, 2024

Apache Synapse is a lightweight and high-performance Enterprise Service Bus (ESB)

Java 76 62 Updated Oct 8, 2025

Bither for desktop OS (Windows, Linux, MacOS and so on)

Java 73 59 Updated Dec 16, 2025

Mirror of Apache Cocoon

Java 28 24 Updated Jan 22, 2026

Mirror of Apache ACE (incubating)

Java 27 22 Updated Jan 14, 2021

Apache James hupa

Java 23 15 Updated Jun 13, 2023

Mirror of Apache Lenya

Java 19 7 Updated Feb 2, 2024

Mirror of Apache Click

Java 15 10 Updated Dec 10, 2018

Mirror of Apache James postage

Java 2 6 Updated Apr 14, 2023