Vert.x is a tool-kit for building reactive applications on the JVM

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

Embulk: Pluggable Bulk Data Loader.

Workload Automation System

SQL-based streaming analytics platform at scale

Open source tools for building custom schedulers on Amazon ECS

Highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2

RedPen is an open source proofreading tool to check if your technical documents meet the writing standard. RedPen supports various markup text formats (Markdown, Textile, AsciiDoc, Re:VIEW, reStruc…

Java 100本ノック

High throughput data ingestion logger to Fluentd, AWS S3 and Treasure Data

Quasselclient for Android

A filter plugin for Embulk to filter out columns

An unofficial Idobata(https://idobata.io) client implementation for Android.

MapReduce executor plugin for Embulk

Command-line file input plugin for Embulk

Kazuki: a harmonious data store

create indenticons similar to GitHub and Gravatar (retro) avatars.

This plugin uploads a column's value to S3 as one S3 object per row.