Paul Bernet

knowledge-catalog. Google Cloud Knowledge Catalog Tools and Samples

claude-design-system-prompt. Reverse-engineered system prompt and skill library that turns an LLM into an opinionated, accessibility-aware, AI-slop-resistant design collaborator.

orca. Deterministic, AI-driven development flows.

postgres-by-example. Yet another postgresql book!

codeburn. Free, local tool to track AI coding token usage and cost across 31 tools and agents (Claude Code, Cursor, Codex, Gemini and more), by model, project, and task. npx codeburn

ECC. The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

brainapi2. BrainAPI is a knowledge graph–powered AI memory layer that transforms unstructured data into structured knowledge, enabling intelligent search, recommendations, and contextual memory for AI agents and applications.

wuphf. YC S26 | WUPHF by Nex.ai lets you spin up your personal office of AI teammates who collaborate over shared context. Supports Claude Code, Codex, OpenClaw, OpenCode, local LLMs.

stash. Stash — persistent memory layer for AI agents. Episodes, facts, and working context stored in Postgres. MCP server included. Self-hosted, single binary, no cloud required.

codebase-navigator. TypeScript

opencode. The open source coding agent.

ministack. Ministack: Free, open-source local AWS emulator - 55+ services, Terraform compatible, real databases. Free forever. MIT licensed.

scalex. Scala code intelligence for coding agents. Zero Build Server. Zero Compilation. Just answers.

inspector. Testing and evaluation platform to chat, inspect, and debug MCP servers, MCP apps, and ChatGPT apps.

JavaFXDemo. Java

nanoclaw. A lightweight alternative to OpenClaw that runs in containers for security. Connects to WhatsApp, Telegram, Slack, Discord, Gmail and other messaging apps,, has memory, scheduled jobs, and runs directly on Anthropic's Agents SDK

restish. Restish is a CLI for interacting with REST-ish HTTP APIs with some nice features built-in

docling-java. A Java API for Docling

claude-code-showcase. Comprehensive Claude Code project configuration example with hooks, skills, agents, commands, and GitHub Actions workflows

PageIndex. 📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

goose. an open source, extensible AI agent that goes beyond code suggestions - install, execute, edit, and test with any LLM

reader3. Quick illustration of how one can easily read books together with LLMs. It's great and I highly recommend it.

claude-mem. Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More

skills. Public repository for Agent Skills

ragflow. RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with Agent capabilities to create a superior context layer for LLMs

tsdproxy. Automatic Tailscale reverse proxy for Docker containers. Zero sidecars. Label-based config. Automatic HTTPS.

emdash. Emdash is the Open-Source Agentic Development Environment (🧡 YC W26). Run multiple coding agents in parallel. Use any provider.

bun. Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

directory-watcher. A cross-platform Java recursive directory watcher, with a JNA macOS watcher and Scala better-files integration

nativestart. Rust

totp-generator. Generates TOTP tokens in the browser

core. Your Personal AI OS

evaluation-guidebook. Sharing both practical insights and theoretical knowledge about LLM evaluation that we gathered while managing the Open LLM Leaderboard and designing lighteval!

pipeline-project-env-plugin. Java

functorcoder. open source vscode coding assistant in Scala.js

ch.at. Universal Basic Chat

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

layoutz. Simple, beautiful CLI output

claude-code-spec-workflow. Automated workflows for Claude Code. Features spec-driven development for new features (Requirements → Design → Tasks → Implementation) and streamlined bug fix workflow for quick issue resolution (Report → Analyze → Fix → Verify).

log-http-proxy. Log Http/Https Request/Response via MITM

A2A. Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.

sdl-lsp. SDL Language Server

embabel-agent. Agent framework for the JVM. Pronounced Em-BAY-bel /ɛmˈbeɪbəl/

flink-scala-api. Flink Scala API is a thin wrapper on top of Flink Java API which support Scala Types for serialisation as well the latest Scala version

langchain4j-examples. Java

ramalama. RamaLama is an open-source developer tool that simplifies the local serving of AI models from any source and facilitates their use for inference in production, all through the familiar language of containers.

Hex. VOICE → WORDS

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

cody. AI that knows your entire codebase. Custom build edition

DeepSeek-R1.

supervision. We write your reusable computer vision tools. 💜

nvm-windows. A node.js version management utility for Windows. Ironically written in Go.

spring-ai-mcp. Java SDK for the Model Context Protocol (MCP), providing seamless integration between Java and Spring applications and MCP-compliant AI models and tools.

servers. Model Context Protocol Servers

localsend. An open-source cross-platform alternative to AirDrop

akka_streams_tutorial. A collection of runnable and self-contained examples inspired by various akka-streams (pekko-streams), Alpakka (Pekko connectors) and akka-http (pekko-http) docs, tutorials and blogs

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.

Python-Workshop.

crewAI. Framework for orchestrating role-playing, autonomous AI agents. By fostering collaborative intelligence, CrewAI empowers agents to work together seamlessly, tackling complex tasks.

mlcon. Jupyter Notebook

qalgeohash-tsql. SQL Server TSQL Implementation of Geohash types and conversion functions

noredraw. Java

citus. Distributed PostgreSQL as an extension

simple-evals. Python

plantuml4idea. Intellij IDEA plugin for PlantUML

plantuml-parser. Convert the Java(or kotlin) source code to Plantuml

pureconfig. A boilerplate-free library for loading configuration files

gatling-sbt-plugin. Gatling Plugin for SBT

sus4s. A Direct-Style Scala Wrapper Around the Structured Concurrency of Project Loom

aider. aider is AI pair programming in your terminal

tembo.

pg_vectorize. Full-text and semantic search on any Postgres

puter. 🌐 The Internet Computer! Free, Open-Source, and Self-Hostable.

micrometer-pekko. A library for monitoring Apache Pekko that uses Micrometer metrics

pekko-sensors. Apache Pekko Sensors

spliff. Efficient diffing in Scala

pekko-http. The Streaming-first HTTP server/module of Apache Pekko

ferropoly-editor. Editor: creating and editing Ferropoly games

cody-public-snapshot. Type less, code more: Cody is an AI code assistant that uses advanced search and codebase context to help you write and fix code.

pac4j. Security engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...

tools. Assorted useful tools, almost entirely generated using LLMs

pekko-connectors-samples. Example projects building Reactive Integrations using Apache Pekko Connectors

APIv3-java-library. SendinBlue's API v3 Java Library

SingleFile. Web Extension for saving a faithful copy of a complete web page in a single HTML file

web-components-todo. A simple todo list built with various Web Components technologies

lodash. A modern JavaScript utility library delivering modularity, performance, & extras.

underscore. JavaScript's utility _ belt

shiro. Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management

infinispan. Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.

pekko-http-json. Integrate some of the best JSON libs in Scala with Pekko HTTP

pekko-streams-circe. Pekko Streams support for JSON via Circe

jvm-openai. A minimalistic OpenAI API client for the JVM, written in Java 🤖

1brc. 1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java

opentofu. OpenTofu lets you declaratively manage your cloud infrastructure.

thingsboard. Open-source IoT Platform - Device management, data collection, processing and visualization.

flink-scala-3. A collection of Flink examples with Scala 3, but without the deprecated Scala API

gears. A strawman for a low-level async library in Scala 3.

evernote-backup. Backup & export all Evernote notes and notebooks

postgresml. Postgres with GPUs for ML/AI apps.

pass4s. Pass4s is a Scala library providing an abstract layer for cross app messaging.

akka-http-session. Web & mobile client-side akka-http sessions, with optional JWT support

learn-cantrill-io-labs. Standard and Advanced Demos for learn.cantrill.io courses

aws-cdk-examples. Example projects using the AWS CDK

aws-service-catalog-reference-architectures. Sample CloudFormation templates and architecture for AWS Service Catalog

aws-cdk. The AWS Cloud Development Kit is a framework for defining cloud infrastructure in code

pekko-grpc. Apache Pekko gRPC

pekko-connectors. Apache Pekko Connectors is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Apache Pekko.

pekko-connectors-kafka. Apache Pekko Kafka Connector - Pekko-Connectors is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Apache Pekko.

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

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

akka-streams-workshop. Material for the Akka Streams workshop

localstack. 💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline

pekko-samples. Apache Pekko Sample Projects

chatbot. A full-featured, hackable Next.js AI chatbot built by Vercel

kyo. Toolkit for Scala Development

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

javamelody. JavaMelody : monitoring of JavaEE applications

liftoff. Mock Interview Simulator with AI-Powered Feedback

mlflow. The open source AI engineering platform for agents, LLMs, and ML models. MLflow enables teams of all sizes to debug, evaluate, monitor, and optimize production-quality AI applications while controlling costs and managing access to models and data.

ox. Safe direct-style streaming, concurrency and resiliency for Scala on the JVM

akka-projection. Akka Projections is intended for building systems with the CQRS pattern, and facilitate in event-based service-to-service communication.

scala-scraper. A Scala library for scraping content from HTML pages

LLMsPracticalGuide. A curated list of practical guide resources of LLMs (LLMs Tree, Examples, Papers)

pinecone-java-client. The official Java client for the Pinecone vector database

langtorch. 🔥 Building composable LLM applications & workflow with Java.

timefold-solver. The open source Solver AI for Java and Kotlin to optimize scheduling and routing. Solve the vehicle routing problem, employee rostering, task assignment, maintenance scheduling and other planning problems.

KuTu. Wettkampf-App für Kunst- und Geräteturnen

ai-pdf-chatbot-langchain. AI PDF chatbot agent built with LangChain & LangGraph

chart-gpt. AI tool to build charts based on text input

sbt-native-packager. sbt Native Packager

akka-sample-cluster-docker-compose-scala. Scala

flair. A very simple framework for state-of-the-art Natural Language Processing (NLP)

caption-parser. A continuation of the .srt parser started by implicitdef, tolerant on syntax errors, intended for working with real-life .srt files and extended to other formats

Q-server. Q server

the-algorithm-ml. Source code for Twitter's Recommendation Algorithm

the-algorithm. Source code for the X Recommendation Algorithm

sftp. Securely share your files

arch-evident-spring. Java

examples. 🌟 Examples of use cases that utilize Decodable, as well as demos for related open-source projects such as Apache Flink, Debezium, and Postgres.

spring-kotlin-handson. Kotlin

pekko. Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala

flink-adt. Scala ADT support for Apache Flink

whisper.cpp. Port of OpenAI's Whisper model in C/C++

flink. The official repository for the Rock the JVM Flink course

flink-scala-api. A fork of Apache Flink scala bindings for 2.12, 2.13 and 3.x

flink4s. Scala 3.x wrapper for Apache Flink

siri-sx-map. SIRI-SX map client/server

siri-sx-situation-monitor. TypeScript

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

flink-playgrounds. Apache Flink Playgrounds

recipes. The Immerok Apache Flink Cookbook is a collection of examples of Apache Flink applications in the format of "recipes". Each recipe explains how you can solve a specific problem by leveraging one or more of the APIs of Apache Flink. The recipes can be extended or provide a basis for solving your requirements with Apache Flink.

MailHog. Web and API based SMTP testing

dev-local. Local Environment Based on Docker Compose for Real-Time Development

openai-java. OpenAI Api Client in Java

slick-pg. Slick extensions for PostgreSQL

elastic4s. 🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client

scala-oauth2-provider. OAuth 2.0 server-side implementation written in Scala

jwt-scala. JWT support for Scala. Bonus extensions for Play, Play JSON, Json4s, Circe, uPickle, Spray and Argonaut

flink-cdc. Flink CDC is a streaming data integration tool

akhq. Kafka GUI for Apache Kafka to manage topics, topics data, consumers group, schema registry, connect and more...

kcctl. A modern and intuitive command line client for Kafka Connect

pandas. Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more

swagger-akka-http. Support for generating Swagger REST API documentation for Akka-Http based services.

grpcui. An interactive web UI for gRPC, along the lines of postman

spray-json. A lightweight, clean and simple JSON implementation in Scala

little-bob. A simple human name and sentence generator in your language

scion-workbench. SCION Workbench enables the creation of Angular web applications that require a flexible layout to display content side-by-side or stacked, all personalizable by the user via drag & drop.

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.

flink. Apache Flink

flink-scala-3. Scala

spekka. Streaming Productivity Enhancements for Akka

vault-guides. Example usage of HashiCorp Vault secrets management

husky. Health Usability Key

camelinaction2. :camel: This project hosts the source code for the examples of the Camel in Action 2nd ed book :closed_book: written by Claus Ibsen and Jonathan Anstey.

quine. Quine • the streaming graph • https://quine.io • Discord: https://discord.gg/GMhd8TE4MR

akka-http-cors. Akka Http directives implementing the CORS specifications defined by W3C

EPR-by-example. CSS

VictoriaMetrics. VictoriaMetrics: fast, cost-effective monitoring solution and time series database

cxf. Apache CXF

ipf-example. IPF Example application

embedded-kafka. A library that provides an in-memory Kafka instance to run your tests against.

spring-security-samples. Java

OpenPDF. OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDF documents, as well as generating PDFs from HTML. It is licensed under the LGPL and MPL.

nspl. scala plotting (charting, graphing) library

metadata-extractor. Extracts Exif, IPTC, XMP, ICC and other metadata from image, video and audio files

simple-ocr-microservice. Simple OCR microservice with Tesseract, PDFBox and Docker

connect. The swiss army knife of healthcare integration.

zola. A fast static site generator in a single binary with everything built-in. https://www.getzola.org

lima. Linux virtual machines, with a focus on running containers

kafka. Apache Kafka - A distributed event streaming platform

scala-pet-store. An implementation of the java pet store using FP techniques in scala

openapi-generator. OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

config. configuration library for JVM languages using HOCON files

configs. Scala wrapper for Typesafe config

hugo. The world’s fastest framework for building websites.

testcontainers-keycloak. A Testcontainer implementation for Keycloak IAM & SSO.

jitsi-meet. Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.

eclipselink. Eclipselink project

mapdb. MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

enumeratum. A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.