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.
ESLint
The pluggable JavaScript and TypeScript linter that finds and fixes code problems through a fully customizable, plugin-based rule engine.
Vite
Next-generation frontend build tool with an instant dev server, lightning-fast HMR, and optimized production builds.
prettier
An opinionated code formatter that enforces consistent style across every language your project speaks.
Vitest
A blazing-fast unit testing framework powered by Vite, with Jest-compatible APIs out of the box.
typescript-eslint
The official meta-package bundling the TypeScript ESLint parser, plugin, and rule presets behind a single typed config() helper.
Playwright
Cross-browser end-to-end web testing and browser automation with a single API for Chromium, Firefox, and WebKit.
@vitejs/plugin-react
The official Vite plugin for React with Babel-powered Fast Refresh and JSX transforms
tsx
A drop-in replacement for the node CLI that runs TypeScript and ESM files instantly, powered by esbuild.
eslint-config-prettier
Disables ESLint stylistic rules that conflict with Prettier, so the two tools never fight over formatting.
React Router
A multi-strategy router for React, from a lightweight library to a full SSR framework.
Express
The fast, unopinionated, minimalist web framework for Node.js
Next.js
The React framework for production: file-based routing, server rendering, and Rust-powered builds.
jest
Delightful JavaScript testing with zero-config setup, snapshots, mocking, and coverage
esbuild
An extremely fast JavaScript and CSS bundler and minifier written in Go.
ts-node
TypeScript execution engine and REPL for Node.js that runs .ts files directly, without a separate compile step.
eslint-plugin-react
React-specific linting rules for ESLint that catch JSX bugs, enforce Hooks conventions, and keep prop usage consistent.
lint-staged
Run linters and formatters only against the files staged in git, so a slow full-project lint never blocks a commit.
cross-env
Cross-platform CLI for setting environment variables in npm scripts without worrying about Windows vs POSIX syntax.
eslint-plugin-import
ESLint rules that validate ES module import/export syntax and catch broken paths before they hit your build.
Sass
The reference Dart implementation of Sass, the mature CSS preprocessor that compiles SCSS and indented syntax to standards-compliant CSS.
concurrently
Run multiple terminal commands in parallel, with color-coded output and cross-platform support.
eslint-plugin-prettier
Run Prettier as an ESLint rule that reports formatting differences as autofixable lint errors.
pytest
The Python testing framework that makes writing small tests easy and scales to complex functional test suites.
