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

73Health
SDK PyPI

gspread

Pythonic client library for reading and writing Google Sheets

7,510
MIT
Used by 2
88Health
Library Composer

lcobucci/jwt

A simple, RFC 7519-compliant PHP library for creating, signing, and validating JSON Web Tokens

7,479
BSD 3
Used by 2
47Health
Library npm

esprima

A high-performance, standard-compliant ECMAScript parser producing ESTree-compatible ASTs for JavaScript tooling.

7,141
Other
Used by 2
52Health
Library Go

gopher-lua

A pure-Go Lua 5.1 virtual machine and compiler for embedding a scripting language directly into Go applications.

6,988
MIT
Used by 2
91Health
Library Cargo

cxx

Safe, compile-time checked FFI between Rust and C++

6,842
MIT
Used by 2
50Health
Library npm

io-ts

A TypeScript runtime type system that derives static types and runtime decoders/encoders from one composable schema.

6,815
MIT
Used by 2
88Health
Library PyPI

scikit-image

A collection of algorithms for image processing in Python, built on NumPy arrays and interoperable with the scientific Python ecosystem.

6,608
BSD 3
Used by 2
69Health
Tool npm

Wireit

Upgrade your npm, pnpm, or yarn scripts with dependency graphs, caching, and watch mode

6,430
Apache 2.0
Used by 2
49Health
Library npm

simplebar

A lightweight, dependency-free library for replacing native scrollbars with a custom CSS-styled one, without sacrificing native scroll performance.

6,415
MIT
Used by 2
61Health
Library PyPI

pytesseract

A Python wrapper for Google's Tesseract OCR engine.

6,393
Apache 2.0
Used by 2
94Health
Library Cargo

winit

A low-level, cross-platform Rust library for creating windows and handling input/window events.

6,193
Apache 2.0
Used by 2
76Health
Tool PyPI

SWE-bench

Benchmark harness that evaluates whether a language model can actually resolve real-world GitHub issues.

5,993
MIT
Used by 2
69Health
Library Composer

Doctrine Collections

Typed, expressive collection objects for PHP with criteria-based filtering and lazy loading

5,975
MIT
Used by 2
52Health
Library npm

Reach UI (@reach/dialog)

Accessible React modal dialog with built-in focus trapping, scroll locking, and WAI-ARIA compliant markup out of the box.

5,963
MIT
Used by 2
78Health
Library Composer

Laravel Activitylog

Records and queries a full audit trail of activity inside your Laravel application

5,907
MIT
Used by 2
90Health
Tool PyPI

Maturin

Build and publish Rust crates with PyO3, cffi, and uniffi bindings as Python wheels

5,832
Apache 2.0
Used by 2
72Health
Library npm

compressorjs

A JavaScript image compressor that shrinks images in the browser with the Canvas API before you ever hit the network.

5,775
MIT
Used by 2
43Health
Library npm

perfect-freehand

Draw perfect pressure-sensitive freehand lines from an array of input points, with no rendering dependencies.

5,752
MIT
Used by 2
90Health
Library PyPI

MLX-VLM

Run and fine-tune Vision Language Models on Apple Silicon with MLX.

5,591
MIT
Used by 2
44Health
Framework npm

Polka

An extremely minimal, highly performant Express.js alternative built on native Node HTTP.

5,589
MIT
Used by 2
46Health
Library npm

Open Color

An open-source color scheme optimized for UI design, delivered as variables for CSS, Sass, and more.

5,573
MIT
Used by 2
92Health
Library npm

dash.js

Reference JavaScript client for playing MPEG-DASH adaptive video streams directly in the browser.

5,552
BSD 3
Used by 2
79Health
Library PyPI

Flask-SocketIO

Socket.IO integration that brings real-time WebSocket communication to Flask applications

5,508
MIT
Used by 2
81Health
Tool PyPI

gdown

Download public Google Drive files and folders when curl or wget fail

5,450
MIT
Used by 2

Join founders buildingwith open source

Opinionated takes, migration guides, cost-saving tips, and insights from the open source ecosystem.

Subscribe on Substack
Join 750+ subscribers