A Claude Cowork skill that builds your entire PM operating system in under 5 minutes.

Agent harness

A light-weight and powerful meta-prompting, context engineering and spec-driven development system for Claude Code, OpenCode, Gemini CLI, Kilo, Codex, Copilot, Cursor, Windsurf, Antigravity, Augment, Trae, Qwen Code, Cline, and CodeBuddy.

An open source toolkit that allows you to focus on product scenarios and predictable outcomes instead of vibe coding every piece from scratch.

Typst is a new markup-based typesetting system that is designed to be as powerful as LaTeX while being much easier to learn and use. Typst has:

• Built-in markup for the most common formatting tasks
• Flexible functions for everything else
• A tightly integrated scripting system
• Math typesetting, bibliography management, and more
• Fast compile times thanks to incremental compilation
• Friendly error messages in case something goes wrong

Superpowers is a complete software development methodology for your coding agents, built on top of a set of composable skills and some initial instructions that make sure your agent uses them.

Maestro is an open-source framework that makes UI and end-to-end testing for Android, iOS, and web apps simple and fast.
Write your first test in under five minutes using YAML flows and run them on any emulator, simulator, or browser.

openDAW is a next-generation web-based Digital Audio Workstation (DAW) designed to democratize music production and to resurface the process of making music by making high-quality creation tools accessible to everyone, with a strong focus on education and hands-on learning.

openDAW is designed with a strong focus on separation of concerns:

The studio runs independently of any specific service infrastructure.
There is no required login, no vendor lock-in.
Users can work immediately in the browser without creating an account.

The Fluid Corpus Manipulation project (FluCoMa) instigates new musical ways of exploiting ever-growing banks of sound and gestures within the digital composition process, by bringing breakthroughs of signal decomposition DSP and machine learning to the toolset of techno-fluent computer composers, creative coders and digital artists.

Hurl is a command line tool that runs HTTP requests defined in a simple plain text format.

It can chain requests, capture values and evaluate queries on headers and body response. Hurl is very versatile: it can be used for both fetching data and testing HTTP sessions.

Hurl makes it easy to work with HTML content, REST / SOAP / GraphQL APIs, or any other XML / JSON based APIs.

Penpot is the first open-source design tool for design and code collaboration. Designers can create stunning designs, interactive prototypes, design systems at scale, while developers enjoy ready-to-use code and make their workflow easy and fast. And all of this with no handoff drama.

Available on browser or self-hosted, Penpot works with open standards like SVG, CSS, HTML and JSON, and it’s free!

dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.

xh is a friendly and fast tool for sending HTTP requests. It reimplements as much as possible of HTTPie's excellent design, with a focus on improved performance.

File upload and sound recording for livecoding sessions

PWABuilder enables developers to quickly and easily to generate store uploadable packages for the Microsoft, Google Play, and iOS App stores.

An extremely fast Python package and project manager, written in Rust.
A single tool to replace pip, pip-tools, pipx, poetry, pyenv, twine, virtualenv, and more.

An extremely fast Python linter and code formatter, written in Rust.

OpenHands is a platform for software development agents powered by AI.

OpenHands agents can do anything a human developer can: modify code, run commands, browse the web, call APIs, and yes—even copy code snippets from StackOverflow.

Testcontainers is an open source library for providing throwaway, lightweight instances of databases, message brokers, web browsers, or just about anything that can run in a Docker container.

Open-source feature management solution built for developers.