Design patterns implemented in Java

Free and Open Source, Distributed, RESTful Search Engine

Google core libraries for Java

Apache Flink

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

Jenkins automation server

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

A high performance caching library for Java

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

Apache Pulsar - distributed pub-sub messaging system

A Java API for generating .java source files.

Java JsonPath implementation

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly co…

Apache Beam is a unified programming model for Batch and Streaming data processing.

Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.

Apache Storm

Upserts, Deletes And Incremental Processing on Big Data.

Open source version of Google Authenticator (except the Android app)

Main Liquibase Source

Open-Source Subscription Billing & Payments Platform

A reference implementation of a JSON package in Java.

Maxwell's daemon, a mysql-to-json kafka producer

The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF).

Web UI for PrestoDB.

Java rate limiting library based on token-bucket algorithm.

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

Java libraries for writing composable microservices

Netflix Application Monitoring Library