Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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React
The declarative, component-based JavaScript library for building fast, interactive user interfaces on the web and in native apps.
React DOM
React's official renderer for the DOM and server — createRoot, hydrateRoot, and streaming SSR in one package.
React Testing Library
Simple and complete React DOM testing utilities that encourage good testing practices.
Radix UI
Unstyled, accessible React UI primitives for building your own design system.
Recharts
A composable charting library for React, built on D3 and SVG.
user-event
Simulates the full sequence of real browser events so Testing Library tests behave the way an actual user does.
Requests
The elegant, human-friendly HTTP library that made Python's most-used API for talking to the web.
Pydantic
Data validation and settings management using Python type hints, backed by a Rust core.
pytest
The Python testing framework that makes writing small tests easy and scales to complex functional test suites.
DOM Testing Library
Simple, framework-agnostic DOM query utilities that test your UI the way real users interact with it.
HTTPX
A next-generation HTTP client for Python with sync, async, and HTTP/2 support
Storybook
The industry-standard workshop for building, documenting, and testing UI components in isolation, across every major frontend framework.
Uvicorn
A lightning-fast ASGI server for Python, built on uvloop and httptools.
NumPy
The fundamental N-dimensional array library powering Python's scientific computing stack.
PyYAML
A full-featured YAML parser and emitter for Python, with C-accelerated bindings