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

All Algorithms implemented in Java

Google core libraries for Java

Free universal database tool and SQL client

Getting Started with Spring Boot 3:

Mirror of Apache Kafka

APM, Application Performance Monitoring System

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

Most popular Mocking framework for unit tests written in Java

APM, (Application Performance Management) tool for large-scale distributed systems.

AWS Service registry for resilient mid-tier load balancing and failover.

Admin UI for administration of spring boot applications

Resilience4j is a fault tolerance library designed for Java8 and functional programming

Feign makes writing java http clients easier

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

An annotation processor for generating type-safe bean mappers

Use SQL to query Elasticsearch

Statistical Machine Intelligence & Learning Engine

Hibernate's core Object/Relational Mapping functionality

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

Kafka Web UI

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, R…

Open-Source Subscription Billing & Payments Platform

MockServer enables easy mocking of any system you integrate with via HTTP or HTTPS with clients written in Java, JavaScript and Ruby. MockServer also includes a proxy that introspects all proxied t…

An API Gateway built on Spring Framework and Spring Boot providing routing and more.

PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.

An Application Framework for AI Engineering

Benchmark comparing serialization libraries on the JVM

A Java architecture test library, to specify and assert architecture rules in plain Java