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.

An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

Llama 3+ inference in pure Java

Asking yours data in a natural language way through pre-modeling (data models and semantic models).

Java SDK for interacting with the MCP Toolbox for Databases.

About Essays, and Poc on using runtime evidence to build cleaner code context for AI to reduce hallucinations.

AI Tasks. A LLM integrated agent orchestration tool for Liferay.

LangChain Expression Language (LCEL) As NiFi Processors

High-performance, zero-dependency Java implementation of Token-Oriented Object Notation (TOON) – JSON for LLM prompts at half the tokens

The first Minecraft AI that doesn't just talk—it lives in your world. High-performance Gemini-driven cognitive companion for Fabric 1.21.1.

A Vert.x MCP Server built on top of MCP Java SDK

Examples for using Ollama4j to connect and interact with Ollama models.

Rage4j is a java library thats helps evaluate LLM's based on scientifically grounded metrics

Example project demonstrating how to stream LLM tokens reliably using Spring AI, WebFlux, and NDJSON instead of SSE. Includes backpressure handling, error recovery, and a Vaadin client consuming the NDJSON stream.

A curated collection of Spring Boot projects demonstrating AI and LLM integrations, including examples of AI-powered applications, multi-provider LLM setups, and best practices for Spring AI, modular design, and integration testing.

The watsonx.ai Java SDK is an open-source library that simplifies the integration of IBM watsonx.ai APIs into Java applications. It supports chat completions, streaming, tool calling, embeddings, text classification, text extraction, text detection, reranking, and time-series forecasting.

JsonSpotter, a simple library to extract the longest well-balanced JSON object or array from a JSON string. Helpful for dealing with chatty LLMs that sugar-coat their responses!

Deepdesk is an enterprise-grade platform for empowering business with AI agents.

AI 智能学习助手系统：基于 Spring Boot 3.3 + Java 17 + Vue 3 + Qdrant + Redis，实现AI学习助手、RAG检索评测、资料管理、在线练习和学习分析系统，适合作为学习和简历项目，学习门槛低。

This is an Android application for ecommerce. Users can browse products, add them to their cart, purchase, track orders and chat with AI RAG.