Ingo Kegel

mcp-server-chart. 🤖 A visualization mcp & skills contains 25+ visual charts using @antvis. Using for chart generation and data analysis.

hermes-agent. The agent that grows with you

kotlinx-kover. Kotlin

glowroot. Easy to use, very low overhead, Java APM

heap_mcp_nb. HeapDump .hprof file analysis MCP server using NetBeans Profiler as a backend library

grafana. The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.

jvmguard. Automatic production profiling for JVMs

microservices-demo. Sample cloud-first application with 10 microservices showcasing Kubernetes, Istio, and gRPC.

starlight. 🌟 Build beautiful, accessible, high-performance documentation websites with Astro

astro. The web framework for content-driven websites. ⭐️ Star to support our work!

flow. Vaadin Flow is a Java framework binding Vaadin web components to Java. This is part of Vaadin 10+.

registry. Registry of agents implementing the Agent Client Protocol (ACP)

opencode. The open source coding agent.

cryostat. Self-hosted performance data capture, storage, and analysis for containerized JVMs

agents-integration-patterns. A catalog of integration patterns for multi-agent AI systems — the missing vocabulary between Enterprise Integration Patterns and the agentic era.

lightmetal. Apple Silicon mlx with Zero Dependency Java

GPULlama3.java. GPU-accelerated Llama3.java inference in pure Java using TornadoVM.

jprofiler-mcp. MCP server for JProfiler

awesome-mcp-servers. A collection of MCP servers.

registry. A community driven registry service for Model Context Protocol (MCP) servers.

tracy. Tracy: AI Tracing Library for Kotlin and Java

jafar. Experimental JFR parser

promptfoo. Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

intellij-plugins. Open-source plugins included in the distribution of IntelliJ IDEA Ultimate and other IDEs based on the IntelliJ Platform

DevoxxGenieIDEAPlugin. DevoxxGenie is an agentic plugin for IntelliJ IDEA that uses local LLM's (Ollama, LMStudio, GPT4All, Jan and Llama.cpp) and Cloud based LLMs to help review, test, explain your project code. Latest version now also supports Spec Driven Development with CLI Runners.

spring-ai-examples. Java

spring-ai. An Application Framework for AI Engineering

jediterm. Pure Java Terminal Emulator. Works with SSH and PTY.

pty4j. Pty for Java

Jlama. Jlama is a modern LLM inference engine for Java

io.lithosurfer.client. A client that shows how data can be imported from an csv file.

javalin. A simple and modern Java and Kotlin web framework

fastutil. fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues.

artifact-signing-action.

espanso. A Privacy-first, Cross-platform Text Expander written in Rust

public-apis-4Kr. 한국 서비스에 이용 가능한 Public API 모음 | Public APIs Available for Korean Services

kotlinx-rpc. Add asynchronous RPC services to your multiplatform applications.

coolshapes-react. 100+ abstract shapes with gradient for design & dev project

open-webui. User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

koog. Koog is a JVM (Java and Kotlin) framework for building predictable, fault-tolerant and enterprise-ready AI agents across all platforms – from backend services to Android and iOS, JVM, and even in-browser environments. Koog is based on our AI products expertise and provides proven solutions for complex LLM and AI problems

Chronicle-Queue. Micro second messaging that stores everything to disk

mcp-windbg. Model Context Protocol for WinDbg.

micrometer. An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

hazelcast. Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

plano. Plano is an AI-native proxy server and data plane for agentic apps. Smart LLM routing, observability, agent orchestration, and guardrails so you stay focused on your agents core logic.

vscode-gradle. Manage Gradle Projects, run Gradle tasks and provide better Gradle file authoring experience in VS Code

openai-java. The official Java library for the OpenAI API

jline3. JLine is a Java library for handling console input.

intellij-sdk-docs. IntelliJ SDK Platform Documentation

jclasslib. jclasslib bytecode editor is a tool that visualizes all aspects of compiled Java class files and the contained bytecode.

saxon-gradle. A Gradle plugin for running XSLT transformations with Saxon

java_spec_diff. The Java Language Specification diffs

jvm_spec_diff. The Java Virtual Machine Specification diffs

kmp-process. Process implementation for Kotlin Multiplatform

getenv-kt. A simple kotlin multiplatform getenv implementation

vscode-extension-samples. Sample code illustrating the VS Code extension API.

VTerminal. A new Look-and-Feel (LaF) for Java, which allows for a grid-based display of Unicode characters with custom fore/background colors, font sizes, and pseudo-shaders. Originally designed for developing Roguelike/lite games.

SoftHSMv2. SoftHSM version 2

JsonPath. Java JsonPath implementation

kotlinx-io. Kotlin multiplatform I/O library

intellij-ui-test-robot. The library allows you to write and execute UI tests among IntelliJ IDEA. You can test your Plugin.

langchain4j. 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.

bootstrap. The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

spring-boot. Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

RSyntaxTextArea. A syntax highlighting, code folding text editor for Java Swing applications.

dataframe. Kotlin DataFrame: typesafe in-memory structured data processing for JVM

file-expander-plugin. A IntelliJ plugin that can explore archive-based file in project view

gradle-helm-plugin. A suite of Gradle Plugins for building, publishing and managing Helm Charts

compose-multiplatform. Compose Multiplatform, a modern UI framework for Kotlin that makes building performant and beautiful user interfaces easy and enjoyable.

eclipse.jdt.ls. Java language server

discoapi. The foojay discovery api (discoapi) is made to discover java packages (jre/jdk) from different distributions.

llamafile. Distribute and run LLMs with a single file.

kandy. Kotlin plotting library.

mui-kotlin. Kotlin/JS support for Material-UI

dialog-draggable. Makes HTML <dialog> draggable.

spring-boot-kotlin-js. Full-Stack Spring Boot Kotlin js Project

HotswapAgent. Java unlimited redefinition of classes at runtime.

vale. :pencil: A markup-aware linter for prose built with speed and extensibility in mind.

jsvg. Java SVG renderer

intellij-community. IntelliJ IDEA Community Edition & IntelliJ Platform

kotlin-jupyter. Kotlin kernel for Jupyter/IPython

openai-cookbook. Examples and guides for using the OpenAI API

foojay-toolchains. Java Toolchain Resolve Plugin based on the foojay DiscoAPI

zipkin. Zipkin is a distributed tracing system

knote-java. Simple Spring Boot app to take notes

asm-bytecode-viewer-kotlin. Java

FlatLaf. FlatLaf - Swing Look and Feel (with Darcula/IntelliJ themes support)

ops4j. Ops4j is a framework for creating portable solutions directly from the CLI. The best analogy would be apache-camel directly from your bash shell.

ffmpeg-java-samples. ffmpeg usage samples

kotlin-worker-hello-world. Kotlin

AzureSignTool. SignTool Library and Azure Key Vault Support

spring-petclinic-microservices. Distributed version of Spring Petclinic built with Spring Cloud

litiengine. LITIENGINE 🕹 The Java 2D game engine.

jansi. Jansi is a small java library that allows you to use ANSI escape sequences to format your console output which works even on windows.

MuseScore. MuseScore is an open source and free music notation software. For support, contribution, bug reports, visit MuseScore.org. Fork and make pull requests!

Exe4jConfigExtractor. Configuration Extractor for EXE4J PE files

multik. Multidimensional array library for Kotlin

IcedTea-Web. The new home for IcedTea-Web

OpenWebStart. Run Web Start based applications after the release of Java 11

gradle-changelog-plugin. Plugin for parsing and managing the Changelog in a "keep a changelog" style.

memoryfilesystem. An in memory implementation of a JSR-203 file system

modern-unix. A collection of modern/faster/saner alternatives to common unix commands.

pack200. Pack200 - Optimized compression for JAR files

projector-demo. A simple sample application demonstrating running Swing applications remotely

projector-installer. Install, configure and run JetBrains IDEs with Projector Server on Linux or in WSL

projector-client. Common and client-related code for running Swing applications remotely

java-wdb. Windows Developer Box for Java Developers

jetCheck. Property-based test framework

lincheck. Framework for testing concurrent code on JVM languages

jazzer. Coverage-guided, in-process fuzzing for the JVM

javafx-dataapp-sample. JavaFX DataApp sample application by Oracle with greatly simplified setup

jide-oss. JIDE Common Layer

radiance. Building modern, elegant and fast Swing applications

otobo. OTOBO is one of the most flexible web-based ticketing systems used for Customer Service, Help Desk, IT Service Management. https://otobo.io/

osTicket. The osTicket open source ticketing system official project repository, for versions 1.8 and later

dokka. API documentation engine for Kotlin

jdk. JDK main-line development https://openjdk.org/projects/jdk

proguard. ProGuard, Java optimizer and obfuscator

jOOX. jOOX - The Power of jQuery Applied to W3C DOM Like JDBC, DOM is a powerful, yet very verbose low-level API to manipulate XML. The HTML DOM an be manipulated with the popular jQuery product, in JavaScript. Why don't we have jQuery in Java? jOOX is jQuery's XML parts, applied to Java.

darklaf. Darklaf - A themeable swing Look and Feel based on Darcula-Laf

de.uni_heidelberg.zah.GaiaSky. This repo is archived by Flathub as the app is EOL. If this was done in error, please open an issue at https://github.com/flathub/flathub/issues

intellij-platform-plugin-template. Template repository for creating plugins for IntelliJ Platform

templates. Templates for Cloudflare Workers

strongbox. Strongbox is an artifact repository manager.

valiktor. Valiktor is a type-safe, powerful and extensible fluent DSL to validate objects in Kotlin

openjdk-api-v3. AdoptOpenJDK API V3 🚀

clikt. Multiplatform command line interface parsing for Kotlin

kotlinx.serialization. Kotlin multiplatform / multi-format serialization

apacheds-embedded. An embedded LDAP Directory server using ApacheDS

Orchid. Build and deploy beautiful documentation sites that grow with you

kbsecret. A secret manager backed by Keybase and KBFS.

jabel. Jabel - unlock Javac 9+ syntax when targeting Java 8

GridFileDownloader. Java

charts. Framework 8 version of Vaadin Charts

testcontainers-java. 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.

moko-template. Template project of a Mobile (Android & iOS) Kotlin MultiPlatform project with the MOKO libraries and modularized architecture

multiplatform-settings. A Kotlin Multiplatform library for saving simple key-value data

java-almanac. The history and future of Java.

sftp-fs. An SFTP NIO.2 file system

Liberica. Free and 100% open source Progressive Java Runtime for modern Java™ deployments supported by a leading OpenJDK contributor

kscript. Scripting enhancements for Kotlin

kvision. Object oriented web framework for Kotlin/JS

AWS-Java-Samples. A repository of basic AWS samples to get you started connecting to various AWS Services using the V1 and V2 SDKS

Windows-classic-samples. This repo contains samples that demonstrate the API used in Windows classic desktop applications.

intellij-community. IntelliJ IDEA Community Edition

JetBrainsRuntime. Runtime environment based on OpenJDK for running IntelliJ Platform-based products on Windows, macOS, and Linux

fliclib-linux-hci. Flic SDK for Linux

node-sonos-http-api. An HTTP API bridge for Sonos easing automation. Hostable on any node.js capable device, like a raspberry pi or similar.

sonos-cli. 🎶 Command Line Interface for Sonos

gradle-idea-ext-plugin. Plugin to store IJ settings in gradle script

terse-logback. Structured Logging, Tracing, and Observability with Logback

homebrew-openjdk. AdoptOpenJDK HomeBrew Tap

kotlin-language-server. Kotlin code completion, diagnostics and more for any editor/IDE using the Language Server Protocol

kotlin-examples. Various examples for Kotlin

awesome-kotlin. A curated list of awesome Kotlin related stuff Inspired by awesome-java.

bouncy-gpg. Make using Bouncy Castle with OpenPGP fun again!

sshj. ssh, scp and sftp for java

awesome-apm. A list of awesome APM products (commercial and OSS)

vaadin-on-kotlin. Writing full-stack statically-typed web apps on JVM at its simplest

arthas. Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

svg-inject. A tiny, intuitive, robust, caching solution for injecting SVG files inline into the DOM.

sbt-install4j. SBT plugin for building installers with Install4J

oshi. Native Operating System and Hardware Information

Apollo-11. Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules.

strapdown. Instant and elegant Markdown documents in the browser

config. configuration library for JVM languages using HOCON files

spring-fu. Configuration DSLs for Spring Boot

build-your-own-x. Master programming by recreating your favorite technologies from scratch.

jdk-api-diff. Creates a report of all API changes two JDK versions

spikes. Where ideas & concepts are born & incubated

docker-ejtserver. EJT License Server Docker image

insect. High precision scientific calculator with support for physical units

klaxon. A JSON parser for Kotlin

traute. Enhances java sources compilation in a way to insert null-checks into generated *.class files

spring-bintray-plugin. Kotlin

kxhtml-isomorphic. Demo of multiplatform project using kotlinx.html and kotlinx.serialization

jmxtrans. jmxtrans

run-java-sh. Universal startup script for plain Java applications

kotlinx-cli. Pure Kotlin implementation of a generic CLI parser.

ansible-jprofiler. Ansible role for jprofiler

realworld. "The mother of all demo apps" — Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more

commafeed-firefox. CommaFeed extension using WebExtensions API (DEPRECATED)

ide-java. Java language support for Atom-IDE

gradle-execfork-plugin. A gradle plugin that lets you define Exec and JavaExec tasks that run in the background

mockneat. MockNeat - the modern faker lib.

fuel. The easiest HTTP networking library for Kotlin/Android

jdkapidiff. NOTE: This project has been migrated to https://github.com/AdoptOpenJDK/jdk-api-diff

SeleniumBuilder. Kotlin DSL for Selenium. Provide a possibility to write tests in Kotlin type-safe builders style

Best-websites-a-programmer-should-visit. :link: Some useful websites for programmers.

vagrant. Vagrant is a tool for building and distributing development environments.

gradle. Adaptable, fast automation for all

git-imerge. Incremental merge for git

visualvm. VisualVM is an All-in-One Java Troubleshooting Tool

ktor. Framework for quickly creating connected applications in Kotlin with minimal effort

kweb-core. A Kotlin web framework

intellij-community. IntelliJ IDEA & IntelliJ Platform

gradle-profiler. A tool for gathering profiling and benchmarking information for Gradle builds

jmh-gradle-plugin. Integrates the JMH benchmarking framework with Gradle

least-squares-in-java. Java Least Squares fitting library.

kaadin. Kotlin DSL for Vaadin