#java

Protocol for IDEs and build tools to communicate about compile, run, test, debug and more.

An enterprise-grade Spring Boot framework for stateless Model Context Protocol (MCP) servers in Java (MCP 2026-07-28). OAuth2 resource server, per-handler authorization, OpenTelemetry, Jakarta Validation, audit logging, GraalVM native-image — all opt-in via a one-dependency feature-module pattern.

Dependency Injection and html templates framework for J2CL. Relaxed implementation of Jakarta CDI

Pure Java NFSv3 and NFSv4.2 implementation

Java API and runtime for fn.

A Java configuration library

Self-hostable coverage tracking for any language — Go, JS/TS, Java, Python, PHP, Ruby. Bitbucket, GitHub & GitLab: PR annotations, check runs, coverage gates, badges. Single binary + Postgres.

In-JVM small language model inference

The Ultimate Vectors Library for Java

A code-first BDD testing framework for Kotlin & Java.

YAJCo (Yet Another Java Compiler compiler) is a language parser generator based on annotated model.

Release the power in Java programming

Milton Java WebDAV / CalDAV / CardDAV Server Library that runs on Windows, Mac, Linux, Android and iOS.

The open source tools for building, maintaining and deploying Topic Maps-based applications.

gRPC for Vert.x

Reactive Extensions for Vert.x

Data Prism is an open-source privacy layer for Java/Spring teams putting LLM agents or MCP clients in front of internal APIs holding customer data. It pseudonymises personal data per privacy scope, refuses anything unclassified, and can keep a hash-chained audit trail.

Interactive command line JMX client (with up-to-date dependencies)

livesplit-core is a library that provides a lot of functionality for creating a speedrun timer.

Open-source Java/SpringAI/Spring Boot AI enablement/orchestration layer for applications with RAG, governed actions, providers, vector stores, PII, tenant safety, chat memory, and behavior analysis.

Java-like Components for .NET

Generic library shared between several projects.

Projeto Open Source Java - NFe, NFce

Distributed SolarNode components for collecting data and controlling devices.

A bunch of utilities I use in other projects

Simple API, Complex Emails (Jakarta Mail smtp wrapper)

Java interface to OpenCV, FFmpeg, and more

A software framework for small satellites based on CCSDS MO services

Gatling plugin for Apache Kafka — produce, request-reply, and consume load testing with Avro, Protobuf, and Schema Registry support

Unintrusive Event Sourcing Library for the JVM