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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TypeScript
A strongly typed superset of JavaScript that compiles to clean, portable JavaScript.
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.
ESLint
The pluggable JavaScript and TypeScript linter that finds and fixes code problems through a fully customizable, plugin-based rule engine.
prettier
An opinionated code formatter that enforces consistent style across every language your project speaks.
typescript-eslint
The official meta-package bundling the TypeScript ESLint parser, plugin, and rule presets behind a single typed config() helper.
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.
Lodash
A modern JavaScript utility library delivering modularity, performance, and extras for arrays, objects, and functions.
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.
@babel/core
The core JavaScript compiler that transforms next-generation syntax into code every browser and runtime can understand.
esbuild
An extremely fast JavaScript and CSS bundler and minifier written in Go.
DOMPurify
DOM-only, uber-tolerant XSS sanitizer for HTML, MathML, and SVG that runs in the browser and on the server.
Recharts
A composable charting library for React, built on D3 and SVG.
eslint-plugin-react
React-specific linting rules for ESLint that catch JSX bugs, enforce Hooks conventions, and keep prop usage consistent.
Zustand
A small, fast React state management library with a hook-based API and no boilerplate.
TanStack Table
Headless, type-safe tables and datagrids for React, Vue, Solid, and more.
ws
A simple, blazing-fast, thoroughly tested WebSocket client and server library for Node.js.
eslint-plugin-import
ESLint rules that validate ES module import/export syntax and catch broken paths before they hit your build.
user-event
Simulates the full sequence of real browser events so Testing Library tests behave the way an actual user does.
Marked
A fast, low-level Markdown compiler that parses CommonMark and GFM into HTML in Node.js, browsers, or the CLI.
