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Starred repositories

45 stars written in Java
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Zipkin is a distributed tracing system

Java 17,431 3,103 Updated Apr 8, 2026

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

Java 16,870 1,560 Updated Apr 17, 2026

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

Java 16,690 5,533 Updated Apr 17, 2026

Graphs for Everyone

Java 16,330 2,591 Updated Apr 1, 2026

Git Server with CI/CD, Kanban, and Packages. Seamless integration. Unparalleled experience.

Java 14,870 950 Updated Apr 17, 2026

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

Java 13,976 3,771 Updated Apr 17, 2026

🔎 Open source distributed and RESTful search engine.

Java 12,764 2,525 Updated Apr 17, 2026

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

Java 12,733 3,571 Updated Apr 17, 2026

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

Java 12,625 2,911 Updated Apr 17, 2026

OpenRefine is a free, open source power tool for working with messy data and improving it

Java 11,806 2,136 Updated Apr 17, 2026

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance …

Java 11,587 2,391 Updated Apr 17, 2026

Test Automation Made Simple

Java 8,835 2,025 Updated Apr 17, 2026

Free and open log management

Java 8,010 1,101 Updated Apr 17, 2026

1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java

Java 7,996 2,218 Updated Aug 20, 2024

Apache Kafka® running on Kubernetes

Java 5,774 1,474 Updated Apr 17, 2026

JanusGraph: an open-source, distributed graph database

Java 5,768 1,208 Updated Nov 21, 2025

RStudio is an integrated development environment (IDE) for R

Java 4,983 1,167 Updated Apr 17, 2026

Angry IP Scanner - fast and friendly network scanner

Java 4,930 810 Updated Dec 1, 2025

A machine learning software for extracting information from scholarly documents

Java 4,796 544 Updated Apr 17, 2026

Track and evaluate the performance of your investment portfolio across stocks, cryptocurrencies, and other assets.

Java 3,784 763 Updated Apr 15, 2026

Apache Kafka, Apache Flink and Confluent Platform examples and demos

Java 2,053 1,113 Updated Apr 17, 2026

Apache OpenNLP

Java 1,593 492 Updated Apr 17, 2026

First open-source data discovery and observability platform. We make a life for data practitioners easy so you can focus on your business.

Java 1,401 139 Updated Apr 3, 2026

qStudio - Free SQL Analysis Tool

Java 1,066 54 Updated Dec 6, 2025

Open source research data repository software

Java 1,037 542 Updated Apr 17, 2026

Old Tomighty repo. For the new repos, please refer to: tomighty-osx and tomighty-windows

Java 971 205 Updated Dec 16, 2023

Carrot2: Text Clustering Algorithms and Applications

Java 853 223 Updated Apr 13, 2026

JMX on Capsaicin

Java 843 238 Updated Apr 1, 2026

Ontop is a platform to query relational databases as Virtual RDF Knowledge Graphs using SPARQL

Java 822 182 Updated Apr 17, 2026

A self‑hosted search engine for documents

Java 727 68 Updated Apr 17, 2026
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