Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

Free and Open Source, Distributed, RESTful Search Engine

Ghidra is a software reverse engineering (SRE) framework

Spring Framework

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Netty project - an event-driven asynchronous network application framework

A browser automation framework and ecosystem.

Open Source Identity and Access Management For Modern Applications and Services

Apache Kafka - A distributed event streaming platform

Apache Flink

Bind Android views and callbacks to fields and methods.

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

Jenkins automation server

JDK main-line development https://openjdk.org/projects/jdk

Open-source IoT Platform - Device management, data collection, processing and visualization.

Zipkin is a distributed tracing system

Modular and customizable Material Design UI components for Android

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

Quarkus: Supersonic Subatomic Java.

The ZAP by Checkmarx Core project

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

Arduino IDE 1.x

Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.

Generate diagrams from textual description

Apache ZooKeeper

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

A configuration as code language with rich validation and tooling.

Continuous Inspection

Feign makes writing java http clients easier

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.