A beautiful home server OS for self-hosting with an app store. Buy a pre-built Umbrel Home with umbrelOS, or install on a Raspberry Pi or any x86 system.

The procedural generation voxel engine

An open-source, Qt-based eBook reader for Kobos (and other devices).

An e-ink optimized dashboard that displays calendar events, weather forecast, and current date, for Kobo e-readers using KOReader.

A CSS voxel engine. A 3D grid for the DOM. Renders HTML cuboids by stacking grid layers and applying transforms.

A Killer Sudoku plugin for KoReader

BookLore: A self-hosted, multi-user digital library with smart shelves, auto metadata, Kobo & KOReader sync, BookDrop imports, OPDS support, and a built-in reader for EPUB, PDF, and comics.

Vibe Code Like It's 1986

A lightweight tool for deploying and managing containerised applications across a network of Docker hosts. Bridging the gap between Docker and Kubernetes ✨

Source code for pytogether.org — A fully browser-based collaborative IDE with real-time editing, live drawing, and voice chat.

Marmot helps teams discover, understand, and leverage their data with powerful search and lineage visualisation tools. It's designed to make data accessible for everyone.

Python Data Science Handbook: full text in Jupyter Notebooks

Learning how to make music (music production) in the browser (with Strudel) for total beginners

A modern, beautiful Mermaid.js editor with live preview, multiple themes, and high-quality export. Perfect for developers, designers, and product managers.

A tool to snap pixels to a perfect grid. Designed to fix messy and inconsistent pixel art generated by AI.

Use mkslides to easily turn markdown files into beautiful slides using the power of Reveal.js!

Run LLM prompts from your shell

Executable GenAI prompt templates

A blazingly fast, open-source application server with type-safe APIs, built-in WebAssembly runtime, realtime, auth, and admin UI built on Rust, SQLite & Wasmtime.

Game Desktop Entry Creator with fetching icons and name from Steam API.

Public repository for Agent Skills

s&box is a modern game engine, built on Valve's Source 2 and the latest .NET technology, it provides a modern intuitive editor for creating games

Penpot: The open-source design tool for design and code collaboration

A desktop application for Penpot, an open-source design tool.

Like catnip, a highly addictive agentic coding tool

A desktop app for isolated, parallel agentic development

Create beautiful applications using Go

Some koreader patches

A fast usermode x86 and x86-64 emulator for Arm64 Linux