Open Source Packages

Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.

5929 packages

Kind

postcss

A CSS transformation engine that parses styles into an AST, letting JS plugins lint, prefix, and rewrite CSS — the foundation beneath Autoprefixer, Tailwind, and 200+ other tools.

typescript-eslint

The official meta-package bundling the TypeScript ESLint parser, plugin, and rule presets behind a single typed config() helper.

date-fns

Modern JavaScript date utility library with 200+ pure, immutable functions

Axios

Promise-based HTTP client for the browser and Node.js with interceptors, automatic transforms, and cancellation

lint-staged

Run linters and formatters only against the files staged in git, so a slow full-project lint never blocks a commit.

Zustand

A small, fast React state management library with a hook-based API and no boilerplate.

eslint-plugin-import

ESLint rules that validate ES module import/export syntax and catch broken paths before they hit your build.

Marked

A fast, low-level Markdown compiler that parses CommonMark and GFM into HTML in Node.js, browsers, or the CLI.

Requests

The elegant, human-friendly HTTP library that made Python's most-used API for talking to the web.

Sentry JavaScript (@sentry/browser)

The official Sentry SDK for capturing errors, performance traces, and session replays in browser JavaScript apps.

Pydantic

Data validation and settings management using Python type hints, backed by a Rust core.

js-yaml

A fast, complete YAML 1.2 and 1.1 parser and serializer for JavaScript.

pytest

The Python testing framework that makes writing small tests easy and scales to complex functional test suites.

yaml

A definitive TypeScript parser and stringifier for YAML, supporting 1.1 and 1.2 with comment and CST access.

Commander.js

The complete, battle-tested framework for building Node.js command-line interfaces.

@hookform/resolvers

Official React Hook Form adapters that plug 20+ schema-validation libraries — Zod, Yup, Joi, Valibot, ArkType and more — straight into useForm's resolver.