OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

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

Jenkins automation server

APM, Application Performance Monitoring System

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

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

A damn simple library for building production-ready RESTful web services.

Efficient reliable UDP unicast, UDP multicast, and IPC message transport

GoCD - Continuous Delivery server main repository

Open source Old School RuneScape client

Distributed Graph Database

Cracking the Coding Interview, 5th Edition

Azkaban workflow manager.

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

Cyberduck is a libre FTP, SFTP, WebDAV, Amazon S3, Backblaze B2, Microsoft Azure & OneDrive and OpenStack Swift file transfer client for Mac and Windows.

Generates a unified GraphQL schema from gRPC microservices and other Protobuf sources

Blue Ocean is a reboot of the Jenkins CI/CD User Experience

An open source clone of Amazon's Dynamo.

A system for distributing and managing secrets

A High Dynamic Range (HDR) Histogram

A simple chat demo for socket.io and Android

Syncany is a cloud storage and filesharing application with a focus on security and abstraction of storage.

For more info see

Automated Canary Service

Fast Parallel Async HTTP client as a Service to monitor and manage 10,000 web servers. (Java+Akka)

Eucalyptus Cloud-computing Platform

The Heroic Time Series Database

Backblaze Reed-Solomon Implementation in Java

A (fork of a) slick visualization for your source code