Spring Boot GitHub Repositories (2026) · Open Source Tools

Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...

Spring Explyt — free, open-source (Apache-2.0) Spring & Spring Boot plugin that brings Ultimate-grade tooling to IntelliJ IDEA Community Edition (works in Ultimate too): runtime-accurate bean navigation, inspections & quick fixes, endpoints, Spring debugger, HTTP client, MCP tools for AI agents.

Spring Boot Starter for Orika.

Multi-Project/Module example with Gradle, Kotlin and Spring with Kotlin DSL

Spring Boot 4 microservices on Kind — gateway, MongoDB, Jaeger, Spring Cloud Kubernetes cross-namespace discovery, one make kind-up

Security library for Spring Web MVC: OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...

Core for OPEX exchange, Open Source Cryptocurrency Exchange

Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.

Fast, Small, JDK 21+, GraalVM native friendly SLF4J logging framework

This is an example application to show howto use Spring Boot 4, Angular 22, Kafka with Streams and Mongodb with the virtual threads of Jdk 25 in a clean architecture and a Helm chart for the Kubernetes setup. Structurizr is used for C4 diagrams. Standalone Components are used with Angular.

Template for Spring Boot applications

Repo Laboratório de Desenvolvimento de Software

↥ ↥ ↥ Follow for updates An RBAC permission management system based on Spring Cloud 2025, Spring Boot 4, and OAuth2.

Admin UI for administration of spring boot applications

⚡ Production-Grade Banking & Financial Aggregation REST Platform (Spring Boot 3.3, Java 17, Spring Security 6 JWT, PostgreSQL, Scheduled Market Ingestion).

Nucleo Agentic Runtime

Visual Integration Designer for Apache Camel

A Cloud Native Buildpack that contributes Spring Boot dependency information and slices an application into multiple layers

Database-Backed Durable Java Workflows

Server for executing kotlin code