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LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
Quarkus: Supersonic Subatomic Java.
Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.
Java AI application development framework (supports LLM-tool,skill; RAG; MCP; Agent-ReAct,Team-Agent). Compatible with java8 ~ java26. It can also be embedded in SpringBoot, jFinal, Vert.x, Quarkus, and other frameworks.
Make the model your single source of truth. Erupt is a model-driven engine for enterprise apps: UI, REST APIs, RBAC, data and AI agents are built from one model at runtime — no codegen, no frontend. Java/Kotlin on Spring Boot, Solon, Quarkus & more; SDKs for Python, Go, TypeScript and 6 other languages.
Website for Quarkus project
Config-driven engine that turns JSON into production-grade AI agents. Multi-agent orchestration, 12+ LLM providers, MCP/A2A protocols, RAG, persistent memory, and enterprise compliance (EU AI Act, GDPR, HIPAA). Built on Quarkus.
Simple case of a real world api using quarkus framework.
Hosts Quarkus related workshops
Quarkus Platform aggregates extensions from Quarkus Core and those developed by the community into a single compatible and versioned set that application developers can reference from their applications to align the dependency versions
Quarkus sample application - Super Heroes
This extension enables developers to implement the MCP server features easily.
Model Context Protocol Servers in Quarkus
AI-powered COBOL to Java Quarkus modernization agents using Microsoft Agent Framework. Automates legacy mainframe code modernization with intelligent agents for analysis, conversion, and dependency mapping.
The missing developer UI for Spring Boot and Quarkus!
Lightweight self-hosted application monitoring for small servers. Spring Boot, Micronaut, Quarkus, SQLite-backed history, simple charts. No Prometheus/Grafana stack required.