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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Playwright
Cross-browser end-to-end web testing and browser automation with a single API for Chromium, Firefox, and WebKit.
React Testing Library
Simple and complete React DOM testing utilities that encourage good testing practices.
jest-dom
Custom Jest matchers for asserting on the state of the DOM in your tests.
jest
Delightful JavaScript testing with zero-config setup, snapshots, mocking, and coverage
user-event
Simulates the full sequence of real browser events so Testing Library tests behave the way an actual user does.
testify
The essential Go toolkit for assertions, mocks, and structured test suites.
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.
Storybook
The industry-standard workshop for building, documenting, and testing UI components in isolation, across every major frontend framework.
undici
A fast, spec-compliant HTTP/1.1 client for Node.js, built from scratch with zero runtime dependencies
tempfile
A secure, cross-platform Rust library for temporary files and directories that clean up automatically on drop.
MSW (Mock Service Worker)
Seamless REST and GraphQL API mocking for browser and Node.js
urllib3
A powerful, user-friendly HTTP client for Python with thread-safe connection pooling, TLS verification, and retry handling.
proxy-agent
Maps HTTP, HTTPS, SOCKS, and PAC proxy protocols to the correct Node.js http.Agent implementation automatically.
Puppeteer
Node.js library for automating Chrome and Firefox over the DevTools Protocol and WebDriver BiDi