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

46Health
Library npm

tailwindcss-radix

Tailwind CSS utilities and variants for styling Radix Primitives' data-state attributes.

2,162
MIT
Used by 7
87Health
Library npm

react-medium-image-zoom

Accessible medium.com-style image zoom for React, built on the native dialog element with zero dependencies

2,122
BSD 3
Used by 7
79Health
Library Go

mimetype

Goroutine-safe MIME type and file extension detection for Go, based on magic-number byte signatures.

2,024
MIT
Used by 7
44Health
Library npm

clean-webpack-plugin

A webpack plugin that automatically removes stale build output before and after every compilation.

1,939
MIT
Used by 7
73Health
Library npm

graphql-scalars

A drop-in library of 70+ precise, spec-compliant GraphQL scalar types for emails, dates, IDs, currencies, and geodata.

1,931
MIT
Used by 7
49Health
Library npm

tweetnacl-js

A JavaScript port of the audited TweetNaCl cryptographic library, providing public-key and secret-key encryption, signing, and hashing for Node.js and browsers.

1,924
Other
Used by 7
46Health
Library npm

flat

Flattens nested JavaScript objects into dot-delimited keys and unflattens them back, with a bundled CLI.

1,818
BSD 3
Used by 7
48Health
Library Go

handlers

A collection of composable HTTP middleware for Go's net/http — logging, compression, CORS, proxy headers, and panic recovery.

1,748
BSD 3
Used by 7
88Health
Library Cargo

quick-xml

A high-performance, near-zero-copy XML pull parser and writer for Rust

1,574
MIT
Used by 7
84Health
Library npm

focus-trap

A tiny vanilla-JS library that traps keyboard focus inside a DOM node for accessible modals and dialogs

1,564
MIT
Used by 7
94Health
Library npm

NestJS GraphQL

The official GraphQL module for building type-safe GraphQL APIs in NestJS

1,555
MIT
Used by 7
51Health
Library npm

rss-parser

Lightweight RSS and Atom feed parser for Node.js and the browser that turns XML feeds into plain JavaScript objects

1,530
MIT
Used by 7
74Health
SDK PyPI

Tavily Python

Official Python SDK for Tavily's search, extract, crawl, and research API

1,423
MIT
Used by 7
53Health
Library npm

feed

Generate RSS 2.0, Atom 1.0, and JSON Feed 1.0 syndication feeds from a single TypeScript API.

1,408
MIT
Used by 7
54Health
Library Go

tint

A zero-dependency slog.Handler for Go that writes tinted, colorized console logs.

1,363
MIT
Used by 7
73Health
Library PyPI

SQLAlchemy-Utils

A grab-bag of extra column types, aggregates, and utility functions for SQLAlchemy models.

1,346
BSD 3
Used by 7
87Health
SDK Go

anthropic-sdk-go

Official Go SDK for Claude's Messages, Files, Skills, and Beta agent APIs, with built-in Bedrock and Vertex AI support.

1,232
MIT
Used by 7
95Health
Library PyPI

OpenTelemetry Instrumentation for Logging

Automatic OpenTelemetry trace context injection into Python's standard logging module

1,119
Apache 2.0
Used by 7
95Health
Library PyPI

OpenTelemetry Instrumentation for Redis

Automatic distributed tracing for Python's redis client, including async and sync APIs

1,119
Apache 2.0
Used by 7
91Health
Tool npm

Docusaurus OpenAPI Docs

Docusaurus plugin that generates polished API reference docs directly from an OpenAPI spec

1,102
MIT
Used by 7
47Health
Library npm

react-timeago

A tiny React component that renders live, self-updating relative timestamps like "5 minutes ago".

1,097
MIT
Used by 7
84Health
Library Go

go-winio

Windows-native IO utilities for Go, wrapping named pipes, overlapped I/O, and Win32 file handles behind idiomatic net.Conn and io interfaces.

1,085
MIT
Used by 7
67Health
Tool npm

less-loader

Webpack loader that compiles Less stylesheets into CSS

960
MIT
Used by 7
42Health
Library npm

Portfinder

Find an open port or domain socket on the current machine

899
MIT
Used by 7

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