Julian

skills. Skills for coding agents

nanocoder. An open coding agent for your terminal, built by a community collective rather than a company. Bring your own model, keep your code on your machine, and owe nothing to anyone.

opencode. The open source coding agent.

crush. Glamourous agentic coding for all 💘

git-town. Git branches made easy

metaharness. 🛠️ The meta-harness for AI agents — scaffold your own focused, branded agent harness with its own npx CLI, MCP server, memory, learning loop, and witness-signed releases. Works with Claude Code, Codex, pi.dev, Hermes, OpenClaw, and RVM (hardware-isolated sandbox).

open-code-review. Open-source & free — Battle-tested at Alibaba's scale. Hybrid architecture code review tool: deterministic pipelines + LLM Agent, precise line-level comments, built-in fine-tuned ruleset (NPE, thread-safety, XSS, SQL injection), OpenAI & Anthropic compatible.

oh-my-opencode-slim. Lean, fine tuned Opencode multi agent suite · Mix any models · Auto delegate tasks

rtk. CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies

release-please. generate release PRs based on the conventionalcommits.org spec

mise. dev tools, env vars, task runner

tracy. Tracy: AI Tracing Library for Kotlin and Java

agency-agents. A complete AI agency at your fingertips - From frontend wizards to Reddit community ninjas, from whimsy injectors to reality checkers. Each agent is a specialized expert with personality, processes, and proven deliverables.

agent. AI agent expert in PostgreSQL

vind. vCluster in Docker (vind) is KinD (Kubernetes in Docker) alternative with additional features. For source code, see loft-sh/vcluster repo linked below.

hft-trading-engine. Java Spring Boot HFT Engine with asynchronous multithreading and pessimistic DB locking

pg_textsearch. PostgreSQL extension for BM25 relevance-ranked full-text search. Postgres OSS licensed.

yact-app. YACT (yet another clipboard tool) creates a simple, browser based board to share data between devices in the same yact session

specification-arg-resolver. An alternative API for filtering data with Spring MVC & Spring Data JPA

librepods. AirPods liberated from Apple's ecosystem.

namastack-outbox. Outbox Implementation for Spring Boot

teammaker. TeamMaker creates fair and balanced teams from a list of players based on their ratings, making it easier to organize fun and competitive matches.

java-otp. A one-time password (HOTP/TOTP) library for Java

hoppscotch. Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

tie-gradle-plugins. Java

pear-desktop. Pear 🍐 is extension for music player

evcc. solar charging ☀️🚘

Universal-Cache. Kotlin caching and request sharing via Flow. Main idea: don't load data more times than it's needed. Compiled for Android and iOS.

logcapture. A testing library for asserting logging messages

StateMachine. A Kotlin and Swift DSL for finite state machine

stateless4j. Lightweight Java State Machine

wait4x. Wait4X allows you to wait for a port or a service to enter the requested state.

moneymoney-payback. moneymoney extension for payback accounts

type-map. TypeMap and TypeConverter for a dynamic, extendable, high-performance type conversion library that's native-ready for GraalVM. This robust Java utility provides type-safe retrieval and conversion, leveraging ConcurrentHashMap for thread-safe operations without reflection.

auth. Authentication in Jetpack Compose using Supabase

antlr-kotlin. Support for Kotlin as a target for ANTLR 4

MocKMP. A mocking processor for Kotlin Multiplatform

SmartTube. Browse media content with your own rules on Android TV

kopy. Nested copies made easy in Kotlin

QuickStack. Open-source, self-hostable alternative to Vercel, Netlify, Railway and Heroku. Self-host any app on your own servers in minutes.

moquette. Java MQTT lightweight broker

archive-fs. An implementation of JDK 1.7's FileSystemProvider to support the Tar file format

ComposeCharts. Animated & Flexible Practical Charts For Jetpack Compose

AAY-chart. A chart library for Compose Multiplatform

ksoup. Ksoup is a Kotlin Multiplatform library for working with HTML and XML. It's a port of the renowned Java library Jsoup.

browser. Lightpanda: the headless browser designed for AI and automation

ghostty. 👻 Ghostty is a fast, feature-rich, and cross-platform terminal emulator that uses platform-native UI and GPU acceleration.

log-captor. 🎯 LogCaptor captures log entries for unit and integration testing purposes

awesome-kotlin-notebook. A curated collection of ready-to-run Kotlin Notebooks in IntelliJ —accelerate your experiments, especially GenAI PoCs

sky-follower-bridge. Instantly find and follow the same users from your X(Twitter) follower on Bluesky.

openage. Clone of the Age of Empires II engine 🚀

transmittable-thread-local. 📌 a missing Java std lib(simple & 0-dependency) for framework/middleware, provide an enhanced InheritableThreadLocal that transmits values between threads even using thread pooling components.

KMP-RWMutex. A read-write mutex for Kotlin Multiplatform based on Golang's sync.RWMutex implementation.

amazon-q-developer-cli. ✨ Agentic chat experience in your terminal. Build applications using natural language.

ktfmt. A program that reformats Kotlin source code to comply with the common community standard for Kotlin code conventions.

graal-languages-demos. Graal Languages - Demos and Guides

ort. A suite of tools to automate software compliance checks.

taikai. Taikai is an extension of the popular ArchUnit library, offering a comprehensive suite of predefined rules tailored for various technologies.

chicory. Native JVM WebAssembly runtime

CleanArchitectureForAndroid. Clean Architecture for Android - a sample project

spring-funk. A framework for declarative DSL configuration for Spring Boot.

mappie. Kotlin object mapping made simple and quick.

autumo-beetroot. autumo beetRoot - Slim & Rapid Java Web Framework

fory. A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.

Mokkery. The mocking library for Kotlin Multiplatform, easy to use, boilerplate-free and compiler plugin driven.

pgbadger. A fast PostgreSQL Log Analyzer

ShedLock. Distributed lock for your scheduled tasks

blog-database-up. Sample code for the Database Startup Validator blog post.

jdeps-gradle-plugin. Run JDeps on a Gradle build

spring-restbucks. Implementation of the sample from REST in Practice based on Spring projects

performa. A multi-server monitoring system with a web based UI.

zed. Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.

esProc. esProc SPL is a JVM-based programming language designed for structured data computation, serving as both a data analysis tool and an embedded computing engine.

talk-migrate-jpa-to-spring-data-jdbc. A talk about what to watch out for when migrating from JPA to Spring Data JDBC

dumb-flyway-validate. CLI tool to validate flyway migration for CI/CD

kotlin-magazine. fun code() – A magazine for Kotlin™ developers

spring-cloud-gateway-for-spring-mvc. Hi, Spring fans! In this week's installment we look at the Spring Cloud Gateway module for Spring MVC

observability-deep-dive. Exploring observability with Logback, Brave, Otel, Spring Boot, Loki, Tempo etc.

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

engineering-management. A collection of inspiring resources related to engineering management and tech leadership

lazydocker. The lazier way to manage everything docker

micrometer-jvm-extras. A set of additional JVM process metrics for micrometer.io.

kotlin-explorer. Desktop tool to quickly explore disassembled Kotlin code.

umbrel. An elegant home server OS. Run OpenClaw, store your files and photos, run a Bitcoin node, and do more with over 300 apps in the Umbrel App Store.

katlib. Companion to Kotlin standard library

kotlinx-benchmark. Kotlin multiplatform benchmarking toolkit

examples. java and spring boot examples

config4k. A Kotlin wrapper for Typesafe Config

jasyncapi. /jay-sync-api/ is a Java code-first tool for AsyncAPI specification

docker-call. Go

expiringmap. A high performance thread-safe map that expires entries

invokebinder. A Java DSL for binding method handles forward, rather than backward

testcontainers-junit4-mock. JUnit4-Mock for Testcontainers Java

spring-boot-tracing-demo. Distributed tracing with Spring Boot and OpenTelemetry

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

javers. JaVers - object auditing and diff framework for Java

flowable-engine. A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.

loki-logback-appender. Fast and lightweight implementation of Logback appender for Grafana Loki

x86-64-level. x86-64-level - Get the x86-64 Microarchitecture Level on the Current Machine

mqtt-starter. HiveMQ Spring Boot Starter

FlowRedux. Kotlin Multiplatform Statemachine library with nice DSL based on Flow from Kotlin Coroutine's.

NextChat. ✨ Light and Fast AI Assistant. Support: Web | iOS | MacOS | Android | Linux | Windows

Orchis-theme. Orchis is a [Material Design](https://material.io) theme for GNOME/GTK based desktop environments.

kotlinx-atomicfu. The idiomatic way to use atomic operations in Kotlin

graalpy-jbang. Java

Ktorfit. HTTP client generator / KSP plugin for Kotlin Multiplatform (Android, iOS, Js, Jvm, Native, WasmJs)) using KSP and Ktor clients inspired by Retrofit https://foso.github.io/Ktorfit

odo. odo - Developer-focused CLI for fast & iterative container-based application development on Podman and Kubernetes. Implementation of the open Devfile standard. Officially DEPRECATED: https://odo.dev/blog/odo-deprecation-announcement/

krontab. Library for using Crontab-like syntax in scheduling of some Kotlin Coroutines tasks to do from time to time

kscript. Scripting enhancements for Kotlin

from-java-to-kotlin. From Java To Kotlin - Your Cheat Sheet For Java To Kotlin

profile-summary-for-github. Tool for visualizing GitHub profiles

sourcerer-app. 🦄 Sourcerer app makes a visual profile from your GitHub and git repositories.

okio. A modern I/O library for Android, Java, and Kotlin Multiplatform.

Pokedex. 🗡️ Pokedex demonstrates modern Android development with Hilt, Material Motion, Coroutines, Flow, Jetpack (Room, ViewModel) based on MVVM architecture.

mockative. Mocking for Kotlin/Native and Kotlin Multiplatform using the Kotlin Symbol Processing API (KSP)

jooby. The modular web framework for Java and Kotlin

jstachio. Java type safe statically compiled mustache

gitbook. The open source frontend for GitBook doc sites

bruno. Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

backup-restore-sidecar. K8s sidecar for database auto-backup and -recovery

kotlinter-gradle. Painless, fast ktlint plugin for Gradle

auto-service-ksp. A KSP implementation of AutoService

rainbowgum. Fast, Small, JDK 21+, GraalVM native friendly SLF4J logging framework

jasync-sql. Java & Kotlin Async DataBase Driver for MySQL and PostgreSQL written in Kotlin

turbine. A testing library for kotlinx.coroutines Flow

ktor-reactive-rest-hyperskill. Example of Reactive API REST with Ktor for HyperSkill

konform. Portable validations for Kotlin

awesome-ktor. Awesome books, tutorials, courses, and resources for the Ktor framework ecosystem. ⚡

kotlin-power-assert. Kotlin compiler plugin to enable diagrammed function calls in the Kotlin programming language

kotlin-cheat-sheet. 📄 A cheat sheet for Kotlin programming language

kotlin-interactive-shell. Kotlin Language Interactive Shell

kotlin-shell. Tool for performing shell-like programing in Kotlin

kotlin-asyncapi. Simplify event-driven API documentation for Kotlin microservices

colima. Container runtimes on macOS (and Linux) with minimal setup

rxjava3-jdbc. Java

rxjava2-jdbc. RxJava2 integration with JDBC including Non-blocking Connection Pools

pkl. A configuration as code language with rich validation and tooling.

questdb. QuestDB is a high performance, open-source, time-series database

task. A fast, cross-platform build tool inspired by Make, designed for modern workflows.

graalvm-demos. This repository contains example applications to illustrate the different capabilities of GraalVM

wiremock-spring-boot. WireMock Spring Boot drastically simplifies testing HTTP clients in Spring Boot & Junit 5 based integration tests.

spring-boot-testjars. Java

jwt-cli. A super fast CLI tool to decode and encode JWTs built in Rust

just. 🤖 Just a command runner

polyglot-embedding-demo. Demonstration repository showing polyglot embedding with GraalVM for JDK 21 using Maven and Gradle.

awesome-rust. A curated list of Rust code and resources.

awesome-go. A curated list of awesome Go frameworks, libraries and software

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

jan. Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.

zx. A tool for writing better scripts

docker-alpine-glibc. Minimal Alpine Linux Docker image with glibc

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

yGuard. The open-source Java obfuscation tool working with Ant and Gradle by yWorks - the diagramming experts

cv. Print-friendly, minimalist CV page

Joiner. Framework for type-safe JPA queries, which is focused on projects with complex domain model

jte. Secure and speedy templates for Java and Kotlin.

pebble. Java Template Engine

typst. A markup-based typesetting system that is powerful and easy to learn.

Stirling-PDF. #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

Kotlin-Algorithms-and-Design-Patterns. This repository contains the most common algorithms and data structures written in the Kotlin language with simple and concise code.

java-jq. Lightweight Java wrapper around JQ, a flexible JSON processor available for multiple platforms

devpod. Codespaces but open-source, client-only and unopinionated: Works with any IDE and lets you use any cloud, kubernetes or just localhost docker.

AdGuardHome. Network-wide ads & trackers blocking DNS server

genai-stack. Langchain + Docker + Neo4j + Ollama

dufs. A file server that supports static serving, uploading, searching, accessing control, webdav...

LLM_AppDev-HandsOn. Repository and hands-on workshop on how to develop applications with local LLMs

pgroll. PostgreSQL zero-downtime migrations made easy

spring-boot-startup-report. Spring Boot Startup Report library generates an interactive Spring Boot application startup report that lets you understand what contributes to the application startup time and perhaps helps to optimize it.

gpt-crawler. Crawl a site to generate knowledge files to create your own custom GPT from a URL

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

makeself. A self-extracting archiving tool for Unix systems, in 100% shell script.

fuel. The easiest HTTP networking library for Kotlin/Android

ollama. Get up and running with Kimi-K2.6, GLM-5.2, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.

chatpad. Not just another ChatGPT user-interface!

jackson-module-kogera. Lightweight and high-performance jackson-module-kotlin

jackson-modules-base. Uber-project for foundational modules of Jackson that build directly on core components but nothing else; not including data format or datatype modules

frogmouth. A Markdown browser for your terminal

private-gpt. Complete API layer for private AI applications on local models: RAG, skills, tools, MCP, text-to-sql, and more. Works with any OpenAI-compatible inference server.

spring-boot-user-beans. A visual way to increase the developer awareness to minimize the number of Beans in memory.

FiraCode. Free monospaced font with programming ligatures

ayza. 🔐 An SSL library for configuring http client or server. Rich with features such as hot reloading ssl and trusting additional certificates during runtime, combining multiple keystores, loading pem files and os/jdk certificates, logging certificate information during ssl handshake, bypassing ssl configuration from other libraries and more

chatbox. Powerful AI Client

creek-json-schema-gradle-plugin. A Gradle plugin for generating JSON schemas from code.

codecv. Manage your resume as structured data: CV format specification and tools to manage CV documents.

fastjson2. 🚄 FASTJSON2 is a Java JSON library with excellent performance.

spring-batch-graalvm-demo. Java

badass-jlink-plugin. Create a custom runtime image of your modular application

jpackage-gradle-plugin. JPackage Gradle Plugin

timetagger. Tag your time, get the insight

90DaysOfDevOps. This repository started out as a learning in public project for myself and has now become a structured learning map for many in the community. We have 3 years under our belt covering all things DevOps, including Principles, Processes, Tooling and Use Cases surrounding this vast topic.

java-design-patterns. Design patterns implemented in Java

ktargeter. Kotlin compiler plugin that allows overriding annotation use-site targets for properties 🛠️

devops-exercises. Linux, Jenkins, AWS, SRE, Prometheus, Docker, Python, Ansible, Git, Kubernetes, Terraform, OpenStack, SQL, NoSQL, Azure, GCP, DNS, Elastic, Network, Virtualization. DevOps Interview Questions

Docker-OSX. Run macOS VM in a Docker! Run near native OSX-KVM in Docker! X11 Forwarding! CI/CD for OS X Security Research! Docker mac Containers.

ChatGPT. ❄️ ChatGPT Desktop Application (Mac, Windows and Linux)

docker-pgautoupgrade. A PostgreSQL Docker container that automatically upgrades your database

mordant. Multiplatform text styling for Kotlin command-line applications

jsch. fork of the popular jsch library

sqlite-jdbc-crypt. SQLite JDBC Driver with encryption support

lanterna. Java library for creating text-based GUIs