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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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.
Marked
A fast, low-level Markdown compiler that parses CommonMark and GFM into HTML in Node.js, browsers, or the CLI.
Sass
The reference Dart implementation of Sass, the mature CSS preprocessor that compiles SCSS and indented syntax to standards-compliant CSS.
Pydantic
Data validation and settings management using Python type hints, backed by a Rust core.
testify
The essential Go toolkit for assertions, mocks, and structured test suites.
js-yaml
A fast, complete YAML 1.2 and 1.1 parser and serializer for JavaScript.
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.
Oxlint
Rust-based JavaScript/TypeScript linter that runs 50-100x faster than ESLint, with zero configuration required.
undici
A fast, spec-compliant HTTP/1.1 client for Node.js, built from scratch with zero runtime dependencies
Cobra
The commander library that powers Kubernetes, Hugo, and GitHub CLI's command-line interfaces.
jwt
A zero-dependency Go implementation of JSON Web Tokens (JWT) with pluggable HMAC, RSA, RSA-PSS, ECDSA, and Ed25519 signing methods.
url
A WHATWG-standard-compliant URL parser and manipulation library for Rust.
PapaParse
The fastest in-browser CSV parser for JavaScript, with streaming, Web Workers, and zero dependencies
Clap
The most widely used command-line argument parser for Rust, with both derive and builder APIs.
SWC
Rust-based JavaScript/TypeScript compiler, a drop-in super-fast alternative to Babel
markdown-it
A fast, pluggable CommonMark-compliant Markdown parser and renderer for JavaScript, safe by default.
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.
Prisma Client
Auto-generated, type-safe database client for Node.js and TypeScript.
Cheerio
The fast, flexible library for parsing and manipulating HTML and XML with a familiar jQuery-style API.
AWS SDK for Go v2
The official AWS SDK for Go — type-safe, modular clients for every AWS service.
yargs
The modern, pirate-themed command-line argument parser and command framework for Node.js
