Justin Lee

endive. The JVM native WebAssembly runtime

fifty-states. Redistricting analysis for all 50 U.S. states

nanocode. Minimal Claude Code alternative. Single Java file, runnable with jbang, zero..eh..1 json dependency, ~260 lines.

github-workflows-kt. Authoring GitHub Actions workflows in Kotlin. You won't go back to YAML!

smileyVars. Template engine for SQL

njord. Publish where you want!

winboat. Run Windows apps on 🐧 Linux with ✨ seamless integration

sd. Intuitive find & replace CLI (sed alternative)

linear-algebra. A concise, beginner-friendly introduction to the core ideas of linear algebra.

godot-kotlin-jvm. Godot Kotlin JVM Module

metro. A multiplatform, compile-time dependency injection framework for Kotlin

anvil. A Kotlin compiler plugin to make dependency injection with Dagger 2 easier.

manifold. Manifold is a Java compiler plugin, its features include Metaprogramming, Properties, Extension Methods, Operator Overloading, Templates, a Preprocessor, and more.

ExoQuery. Language Integrated Query for Kotlin

displayplacer. macOS command line utility to configure multi-display resolutions and arrangements. Essentially XRandR for macOS.

LLM4Decompile. Reverse Engineering: Decompiling Binary Code with Large Language Models

benny-hill. Play the Benny Hill theme while running another command

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

compiler-plugin-template. Kotlin

llama3-from-scratch. llama3 implementation one matrix multiplication at a time

rHttp. REPL for HTTP

goodreads. code samples for the goodreads datasets

MS-DOS. The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes

foundation. The Commonhaus Foundation fosters a nurturing home for open-source projects, prioritizing innovation, collaboration, and sustainability.

intellij-byte-code-plugin. An IntelliJ plugin that provides a modern and powerful byte code analyzer tool window.

jnv. Interactive JSON filter using jq

letter-boxed-solver. Python

YAIoGoL. Yet Another Implementation of Game of Life

naum. Naum is a tool that checks Java libraries for binary compatibility with previous releases

SootUp. A new version of Soot with a completely overhauled architecture

shell_gpt. A command-line productivity tool powered by AI large language models like GPT-5, will help you accomplish your tasks faster and more efficiently.

Starter-Kit-3D-Platformer. Godot

action-upterm. Debug your GitHub Actions via SSH by using upterm/tmux to get access to the runner system itself.

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

maven-tiles. Injecting maven configurations by composition rather than inheritance

testcontainers-rs-modules-community. Community maintained modules for Testcontainers for Rust

hello. Word-guessing game

word-peaks. A word guessing game of highs and lows

jdk-classfile-backport. An unofficial backport of the JDK Classfile API to Java 17

semantic-kernel. Integrate cutting-edge LLM technology quickly and easily into your apps

wasmtime. A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

fluent. Static extension methods for Java.

javaconferences.github.io. The Github repository for javaconferences.org

just. 🤖 Just a command runner

kapshot. Kotlin Compiler Plugin for source capture

bootiful-asciidoctor. Supports the easy and robust publication of technical books with Asciidoctor

WasmEdge. WasmEdge is a lightweight, high-performance, and extensible WebAssembly runtime for cloud native, edge, and decentralized applications. It powers serverless apps, embedded functions, microservices, smart contracts, and IoT devices.

mima. Minimal Maven reusable one-stop shop library

spec. WebAssembly specification, reference interpreter, and test suite.

Snake. Snake game (Bot included) using the Hamiltonian cycle and some pathfinding algorithms.

kotlin2dart. Tool for converting kotlin code to Dart based on the ktlint engine

metrics. 📊 An infographics generator with 30+ plugins and 300+ options to display stats about your GitHub account and render them as SVG, Markdown, PDF or JSON!

javabot. factoid bot for irc channels

ridiculous_coding. Ridiculous addon for Godot Engine 4 that adds screenshake and explosions to your coding experience

kweb-core. A Kotlin web framework

EDDI. 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.

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

api.congress.gov. congress.gov API

carbon-lang. Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)

cargo-aoc. Rust

wasm-languages. How to use WebAssembly in various languages

GitHubUserFinder. Kotlin Multiplatform sample project with Jetpack Compose and SwiftUI

Wordish. A JavaFX implementation of the word-guess game Wordle.

Expressus. Kotlin Multiplatform Coffee Machine

SlimeKT. An article sharing platform where you can personalize, subscribe to your favorite topics, get daily-read reminders, etc. App built using Kotlin, Dagger Hilt, Room Database, Coroutines, Flow, AndroidX Glance, WorkManager, Coil etc.

nushell. A new type of shell

ComposeSpotifyDesktop. Spotify Demo Desktop app using Jetpack compose

Constructor. Construct Projects

rewrite. Automated mass refactoring of source code.

cs-video-courses. List of Computer Science courses with video lectures.

Crossword-Puzzle-Maker. A crossword puzzle generator that creates valid crossword puzzle configurations from the command line. Java program using English language dictionary as word source.

cue. The home of the CUE language! Validate and define text-based and dynamic configuration

Mindustry. The automation tower defense RTS

practical-mongodb-aggregations-book. Practical MongoDB Aggregations book

io.javaalmanac.javadoclink. Generator for Javadoc deep links

PhoenixMinerGUI. Unofficial GUI for PhoenixMiner

codehike. Build rich content websites with Markdown and React

MaterialFX. A library of material components for JavaFX

Compose-boids-flocking. Jetpack Compose Boids | Flocking Insect 🐜. bird or Fish simulation using Jetpack Compose Desktop 🚀, using Canvas API 🎨

github-quarkus-triage. Generate triage report

qbicc. Experimental static compiler for Java programs.

ksp. Kotlin Symbol Processing API

kotlin-ir-plugin-template. Template for IR based Kotlin compiler plugin.

storybook. Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

bit. Bit is a modern Git CLI

CommunityWriterPrograms. A list of Developer Community Writer Programs

bytecode-viewer. A Java 8+ Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

checkstyle-idea. CheckStyle plug-in for IntelliJ IDEA

super-expressive. 🦜 Super Expressive is a zero-dependency JavaScript library for building regular expressions in (almost) natural language

dbfx. This is a free, cross platform, open source database management tool based on JavaFX and vertx SQL client.

javafx-examples. A large collection of JavaFX examples demonstrating basic + advanced features of JavaFX.

layrry. A Runner and API for Layered Java Applications

git-bug. Distributed, offline-first bug tracker embedded in git

intellij-quarkus. IntelliJ Quarkus Tools

lazygit. simple terminal UI for git commands

JLang. JLang: Ahead-of-time compilation of Java programs to LLVM

java-champions. A list of Java Champions

redacted-compiler-plugin. A Kotlin compiler plugin that generates redacted toString() implementations.

jbang. Unleash the power of Java - JBang Lets Students, Educators and Professional Developers create, edit and run self-contained source-only Java programs with unprecedented ease.

flutter_vignettes. A collection of fun Flutter experiments, created by gskinner, in partnership with Google.

Bytecoder. Framework to interpret and transpile JVM bytecode to JavaScript, OpenCL or WebAssembly.

jp. Command line interface to JMESPath - http://jmespath.org

gebbdoom. Game Engine Black Book: Doom

footloose. Container Machines - Containers that look like Virtual Machines

pebble. Java Template Engine

rocker. Java 8 optimized, memory efficient, speedy template engine producing statically typed, plain java objects

agones. Dedicated Game Server Hosting and Scaling for Multiplayer Games on Kubernetes

classgraph. An uber-fast parallelized Java classpath scanner and module scanner.

java-almanac. The history and future of Java.

caffeine. A high performance caching library for Java

jandex. Java Annotation Indexer

autodsl. Auto-generate Kotlin DSL

chorus. :pencil: The first editor for Spigot configurations.

kubernetes-for-java-developers. A Day in Java Developer’s Life, with a taste of Kubernetes

gradle-release. gradle-release is a plugin for providing a Maven-like release process for projects using Gradle

k8s-kotlin-dsl. Kotlin DSL for Kubernetes configs

ge0ffrey-presentations. Geoffrey's presentations, see https://ge0ffrey.github.io/ge0ffrey-presentations/

platform-tck. Jakartaee-tck

inspection-plugin. Gradle plugin to launch IDEA inspections

classroom-scheduling-demo. A branch-and-bound solver to create classroom schedules

kotlin-sudoku-solver. A suduko game solver written in Kotlin

from-scratch. A hands-on walkthrough for creating an extremely insecure Kubernetes cluster and then hardening it, step by step.

kotlinbuilder. Kotlin

tink. Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

apparatus-assembly. Animated usage of apparatus-generator.

RichTextFX. Rich-text area for JavaFX

detekt. Static code analysis for Kotlin

mongo4idea. MongoDB integration in Intellij

swiss-transport-datagrid. Java

thorntail. Source code for the Thorntail project

FXTutorials. A collection of JavaFX tutorials from my YouTube channel

redpipe. Redpipe Web Framework

invaders. Space Invaders in Go

pup. Parsing HTML at the command line

oreilly_kotlin_for_data_science. Notes, slides, and contents for the O'Reilly videos using Kotlin for Data Science

kotlinconf-app. The official KotlinConf application

FXGLGames. This repo contains sample games built with FXGL

FXGL. Java / JavaFX / Kotlin Game Library (Engine)

graal. GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

kotlin. The Kotlin Programming Language.

amazon-deployment-guide. DataStax Enterprise (DSE) Deployment Guide for Amazon Web Services (AWS)

squash. SQL access DSL for Kotlin

LingeringLoot. Custom dropped item despawn times for minecraft forge. Maintained by alexbobp.

rosettacode-kotlin. Repository with source code from http://rosettacode.org/wiki/Category:Kotlin

basilisk. Desktop/Mobile JavaFX application framework

WaveFunctionCollapse. Bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics

endless-sky. Space exploration, trading, and combat game.

tribaltrouble. Restoration fork of classic Java Real Time Strategy Game Tribal Trouble

plt. Programming Language Theory λΠ

swift-evolution. This maintains proposals for changes and user-visible enhancements to the Swift Programming Language.

JavaVerbalExpressions. Java regular expressions made easy.

dokka. API documentation engine for Kotlin

agrona. High Performance data structures and utility methods for Java

metalsmith. An extremely simple, pluggable static site generator for Node.js

bunyan-java. A little logging library that uses the format of NodeJS's bunyan JSON logger

ktrawler. Tool to analyze usage of Kotlin language features in accessible Kotlin projects.

kobalt. A Kotlin-based build system for the JVM.

awesome-browser-extensions-for-github. A collection of awesome browser extensions for GitHub.

spectacle. Spectacle allows you to organize your windows without using a mouse.

pubnames. MongoDB aggregation framework demo - Interactive UK pub names wordle

SampleMongoDBApplication. Sample application using version 2.0 of the .NET Driver for MongoDB

revapi. Revapi is an API analysis and change tracking tool written in Java. Its focus is mainly on Java language itself but it has been specifically designed to not be limited to just Java. API is much more than just java classes - also various configuration files, schemas, etc. can contribute to it and users can become reliant on them.

clirr-gradle-plugin. This plugin allows you to use Clirr from Gradle

walker_method. A Ruby implementation of Walker's Alias Method for quickly sampling from an array with a given probability distribution

zt-process-killer. ZeroTurnaround Process Killer

awesome-java. A curated list of awesome frameworks, libraries and software for the Java programming language.

gitsu. User management and pairing for Git

peco. Simplistic interactive filtering tool

orbit. Orbit - Virtual actor framework for building distributed systems

retrofit. A type-safe HTTP client for Android and the JVM

cmder. Lovely console emulator package for Windows

sense. Demo app that subscribes to Twitter and publishes it via websockets

AsciidocFX. Asciidoc Editor and Toolchain written with JavaFX 21 (Build PDF, Epub, Mobi and HTML books, documents and slides)

japicmp. Comparison of two versions of a jar archive

webapp-runner. Lightweight Java application launcher. Launch your webapp in the most popular open source web container available with a single command.

sweetalert. A beautiful replacement for JavaScript's "alert"

capsule. Dead-Simple Packaging and Deployment for JVM Apps

kotlin-nosql. NoSQL database query and access library for Kotlin

Humanizer.jvm. Kotlin

kotlin-koans. Kotlin workshop

coursera-dl. Script for downloading Coursera.org videos and naming them.

json-editor. JSON Schema Based Editor

gitbucket. A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility

java-classmate. Library for introspecting generic type information of types, member/static methods, fields. Especially useful for POJO/Bean introspection.

crest. Command-line API modeled after JAX-RS (Command REST)

maximum-awesome. Config files for vim and tmux.

jOOQ. jOOQ is the best way to write SQL in Java

togglz. Feature Flags for the Java platform

JSVerbalExpressions. JavaScript Regular expressions made easy

zt-exec. ZeroTurnaround Process Executor

tyrus. Tyrus - Reference implementation of Java API for WebSocket - JSR 356

github-api. Java API for GitHub

mimecraft. Utility for creating RFC-compliant multipart and form-encoded HTTP request bodies.

Ladda. Buttons with built-in loading indicators.

sofia. A typesafe generated API on top of l10n/i18n resource bundles

milo. A servlet container with a pluggable networking layer

intellij-community. IntelliJ IDEA & IntelliJ Platform

websockets-jsr. My proposal for how a WebSockets JSR could mesh with the Servlet specification

embedded-glassfish-example. This is just a simple example of using glassfish's embedded ejb container for unit testing supplementing a blog entry of mine.

glassfish-milestones. Generates a .ics file for 3.1.1 and 3.2 milestones and builds based on the project wiki pages