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

All Algorithms implemented in Java

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

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…

A Java serialization/deserialization library to convert Java Objects into JSON and back

MyBatis SQL mapper framework for Java

The ZAP by Checkmarx Core project

Apache ZooKeeper

AI + Data, online. https://vespa.ai

Apache Camel is an open source integration framework that empowers you to quickly and easily integrate various systems consuming or producing data.

Java 1-21 Parser and Abstract Syntax Tree for Java with advanced analysis functionalities.

Automated JSON API documentation for API's built with Spring

A code generator for MyBatis.

This is the new home of the original DDD Sample app (previously hosted at sf.net)..

Yahoo! Cloud Serving Benchmark

OpenGrok is a fast and usable source code search and cross reference engine, written in Java

Open Source Web Crawler for Java

"Maven-node-grunt-gulp-npm-node-plugin to end all maven-node-grunt-gulp-npm-plugins." A Maven plugin that downloads/installs Node and NPM locally, runs NPM install, Grunt, Gulp and/or Karma.

These are the sample Bounded Contexts from the book "Implementing Domain-Driven Design" by Vaughn Vernon: http://vaughnvernon.co/?page_id=168

Example code for the book Microservice patterns

Provide support to increase developer productivity in Java when using Elasticsearch. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style dat…

Twitter4J is an open-source Java library for the Twitter API.

Fluent testing assertions for Java and the JVM

Full Stack Polls App built using Spring Boot, Spring Security, JWT, React, and Ant Design

Go further into "Learn Spring Security":

Retail banking sample application showcasing Kubernetes and Google Cloud

Transactional messaging for microservices

Open source platform for X.509 certificate based service authentication and fine grained access control in dynamic infrastructures. Athenz supports provisioning and configuration (centralized autho…

Container auto-configurations for Spring Boot based integration tests

Examples for O'Reilly & Associates Java Performance Tuning: The Definitive Guide