Directory

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

All Packages

97Health
Tool npm

TypeScript

A strongly typed superset of JavaScript that compiles to clean, portable JavaScript.

111,050
Apache 2.0
Used by 500
94Health
Tool npm

Vite

Next-generation frontend build tool with an instant dev server, lightning-fast HMR, and optimized production builds.

82,823
MIT
Used by 324
92Health
Library npm

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.

28,972
MIT
Used by 277
93Health
Tool npm

@vitejs/plugin-react

The official Vite plugin for React with Babel-powered Fast Refresh and JSX transforms

1,158
MIT
Used by 209
88Health
Library npm

Autoprefixer

Parses your CSS and automatically adds vendor prefixes using real-world browser usage data from Can I Use.

22,229
MIT
Used by 198
86Health
Tool npm

tsx

A drop-in replacement for the node CLI that runs TypeScript and ESM files instantly, powered by esbuild.

12,141
MIT
Used by 177
95Health
Library npm

@babel/core

The core JavaScript compiler that transforms next-generation syntax into code every browser and runtime can understand.

43,996
MIT
Used by 163
82Health
Tool npm

esbuild

An extremely fast JavaScript and CSS bundler and minifier written in Go.

40,058
MIT
Used by 139
52Health
Tool npm

ts-node

TypeScript execution engine and REPL for Node.js that runs .ts files directly, without a separate compile step.

13,124
MIT
Used by 122
75Health
Library Cargo

serde_json

The de facto standard JSON library for Rust, built on the Serde serialization framework

5,636
Apache 2.0
Used by 111
76Health
Library Cargo

serde

A generic framework for serializing and deserializing Rust data structures efficiently and safely.

10,825
Other
Used by 108
82Health
Library npm

js-yaml

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

6,630
MIT
Used by 101
90Health
Library npm

yaml

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

1,691
Other
Used by 98
51Health
Library npm

jsonwebtoken

The de facto Node.js library for signing, verifying, and decoding JSON Web Tokens.

18,196
MIT
Used by 93
97Health
Tool npm

webpack

A static module bundler that builds a dependency graph of your project's modules and packages them into optimized browser bundles

65,948
MIT
Used by 90
66Health
Tool npm

tsup

Zero-config TypeScript library bundler powered by esbuild

11,295
MIT
Used by 84
55Health
Library PyPI

PyYAML

A full-featured YAML parser and emitter for Python, with C-accelerated bindings

2,942
MIT
Used by 79
94Health
Tool npm

webpack-cli

The official command-line interface for webpack, adding build, watch, serve, and config-validation commands to any project.

2,616
MIT
Used by 72
78Health
Library npm

vite-tsconfig-paths

Resolves TypeScript's tsconfig.json path aliases inside Vite, so aliased imports work without redeclaring them in the Vite config.

1,632
MIT
Used by 68
89Health
Library npm

jose

Zero-dependency JWT, JWS, JWE, and JWK toolkit for Node.js, browsers, and edge runtimes.

7,792
MIT
Used by 66
67Health
Library Cargo

base64

Correct, fast, and configurable base64 encoding and decoding for Rust, with pluggable alphabets and padding.

736
Apache 2.0
Used by 66
69Health
Library npm

JSZip

Create, read, and edit ZIP files directly in JavaScript, in the browser or Node.js.

10,383
Other
Used by 65
72Health
Tool npm

css-loader

Resolves CSS @import and url() like JavaScript imports so webpack can bundle stylesheets and their assets.

4,320
MIT
Used by 65
66Health
Library Cargo

url

A WHATWG-standard-compliant URL parser and manipulation library for Rust.

1,576
Apache 2.0
Used by 62

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