Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
Category
Sort:Used by Most Apps
Playwright
Cross-browser end-to-end web testing and browser automation with a single API for Chromium, Firefox, and WebKit.
dotenv
Loads environment variables from a .env file into process.env for Node.js apps.
date-fns
Modern JavaScript date utility library with 200+ pure, immutable functions
jsdom
A pure-JavaScript implementation of the WHATWG DOM and HTML standards for Node.js.
React Testing Library
Simple and complete React DOM testing utilities that encourage good testing practices.
Axios
Promise-based HTTP client for the browser and Node.js with interceptors, automatic transforms, and cancellation
jest-dom
Custom Jest matchers for asserting on the state of the DOM in your tests.
Express
The fast, unopinionated, minimalist web framework for Node.js
jest
Delightful JavaScript testing with zero-config setup, snapshots, mocking, and coverage
AWS SDK for JavaScript (S3 Client)
The official modular AWS SDK v3 client for Amazon S3, with TypeScript-first APIs and streaming support.
ws
A simple, blazing-fast, thoroughly tested WebSocket client and server library for Node.js.
user-event
Simulates the full sequence of real browser events so Testing Library tests behave the way an actual user does.
serde_json
The de facto standard JSON library for Rust, built on the Serde serialization framework
sharp
High-performance Node.js image processing powered by libvips, built for fast resizing and format conversion.
i18next
The internationalization framework for JavaScript, with zero runtime dependencies and a pluggable ecosystem for every environment.
serde
A generic framework for serializing and deserializing Rust data structures efficiently and safely.
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.
Tokio
The async runtime powering most of Rust's networked, concurrent, and I/O-bound applications.
OpenTelemetry JavaScript (@opentelemetry/api)
Vendor-neutral tracing, metrics, and context API that libraries and apps instrument once, so any OpenTelemetry-compatible backend can consume it.
DOM Testing Library
Simple, framework-agnostic DOM query utilities that test your UI the way real users interact with it.
OpenAI
The official Node.js/TypeScript client for the OpenAI API, auto-generated from OpenAI's own OpenAPI spec.
fs-extra
Drop-in replacement for Node's fs module adding copy, remove, mkdirs, and JSON helpers with native promise support.
Storybook
The industry-standard workshop for building, documenting, and testing UI components in isolation, across every major frontend framework.
