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.
serde_json
The de facto standard JSON library for Rust, built on the Serde serialization framework
Marked
A fast, low-level Markdown compiler that parses CommonMark and GFM into HTML in Node.js, browsers, or the CLI.
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.
fs-extra
Drop-in replacement for Node's fs module adding copy, remove, mkdirs, and JSON helpers with native promise support.
diff
A battle-tested JavaScript library for computing and applying text diffs at the character, word, line, sentence, CSS, or JSON level.
Pino
A super fast, low-overhead JSON logger for Node.js applications.
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.
markdown-it
A fast, pluggable CommonMark-compliant Markdown parser and renderer for JavaScript, safe by default.
Winston
A battle-tested Node.js logging library with pluggable transports, custom formats, and multiple log levels.
Cheerio
The fast, flexible library for parsing and manipulating HTML and XML with a familiar jQuery-style API.
typing_extensions
Backported and experimental type-hint features for Python, usable on older interpreters and ahead of the stdlib.
PyJWT
A Python implementation of RFC 7519 for encoding, decoding, and verifying JSON Web Tokens.
sanitize-html
Allowlist-based HTML sanitizer that strips XSS vectors from untrusted markup while preserving the tags and attributes you choose to keep.
body-parser
Node.js body-parsing middleware that turns raw HTTP request bodies into ready-to-use req.body objects.
cron-parser
Parse, validate, and iterate cron expressions in Node.js with full timezone and DST support.
cRonstrue
Turns cron expressions into human-readable descriptions, in 30+ languages.
type-fest
A collection of essential, ready-made TypeScript utility types beyond the built-in standard library.
superjson
Serialize JavaScript to a superset of JSON that keeps Dates, Maps, Sets, BigInts, and more intact.
fast-xml-parser
Pure-JS XML parser, builder, and validator with no C/C++ bindings and no callbacks
gray-matter
Fast, dependable front-matter parser for YAML, JSON, TOML, and CoffeeScript metadata blocks
