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

44Health
Library npm

react-device-detect

Detect device, browser, and OS type in React and conditionally render views accordingly

2,920
MIT
Used by 13
60Health
Library PyPI

drf-spectacular

Sane, flexible OpenAPI 3.0/3.1/3.2 schema generation for Django REST Framework

2,868
BSD 3
Used by 13
92Health
Library Cargo

OpenTelemetry Rust

The official Rust implementation of OpenTelemetry, providing vendor-neutral tracing, metrics, and logging APIs.

2,744
Apache 2.0
Used by 13
45Health
Library Cargo

Strum

Derive macros and traits that make Rust enums easier to convert to and from strings

2,465
MIT
Used by 13
57Health
Library npm

image-size

Fast, zero-dependency Node.js library that reads image width and height straight from file or buffer headers.

2,228
MIT
Used by 13
94Health
SDK PyPI

Stripe Python

Official Python bindings for the Stripe API, covering payments, billing, and Connect.

2,053
MIT
Used by 13
65Health
Library npm

colord

A tiny, dependency-free TypeScript library for parsing, converting, and manipulating colors in any format.

1,892
MIT
Used by 13
83Health
Library npm

LiquidJS

A TypeScript Liquid template engine for Node.js, browsers, and the CLI — Shopify, Jekyll, and GitHub Pages compatible.

1,882
MIT
Used by 13
72Health
Library Go

go-version

A Go library for parsing, comparing, sorting, and constraint-checking semantic versions, built by HashiCorp for tools like Terraform and Vault.

1,775
MPL-2.0
Used by 13
41Health
Library npm

ResizeObserver Polyfill

A spec-compliant polyfill for the ResizeObserver API using MutationObserver

1,746
MIT
Used by 13
92Health
SDK PyPI

qdrant-client

Official Python SDK for the Qdrant vector search engine

1,373
Apache 2.0
Used by 13
82Health
Library npm

JSONPath

A JavaScript library for querying, transforming, and extracting data from JSON documents using an extended JSONPath syntax.

1,159
MIT
Used by 13
57Health
Library npm

node-sql-parser

Parses SQL statements into an AST and converts them back to SQL across a dozen database dialects.

1,043
Apache 2.0
Used by 13
91Health
Library PyPI

platformdirs

Determine platform-specific user directories for data, config, cache, and logs

995
MIT
Used by 13
80Health
SDK npm

@upstash/redis

HTTP/REST-based Redis client built for serverless and edge runtimes

982
MIT
Used by 13
84Health
Library npm

@nestjs/bullmq

Official NestJS integration module for BullMQ, bringing decorator-based job queues to Nest applications.

704
MIT
Used by 13
42Health
Library Cargo

num_cpus

A small Rust crate for counting the logical and physical CPU cores on the current machine.

625
Other
Used by 13
67Health
Library PyPI

mrab-regex

A backwards-compatible drop-in replacement for Python's re module, adding fuzzy matching, nested sets, recursive patterns, and full Unicode case-folding.

605
Other
Used by 13
91Health
SDK PyPI

clickhouse-connect

ClickHouse's official high-performance Python driver, with native Pandas, NumPy, PyArrow, and Superset support

532
Apache 2.0
Used by 13
62Health
Tool PyPI

pytest-timeout

A pytest plugin that terminates hanging or excessively slow tests and dumps a stack trace when it does

260
MIT
Used by 13
79Health
SDK npm

@supabase/ssr

The official framework-agnostic Supabase client for server-side rendering apps, handling cookie-based auth sessions.

213
MIT
Used by 13
38Health
Library PyPI

sniffio

A tiny Python library that detects which async framework (trio, asyncio, or curio) your code is currently running under.

154
Other
Used by 13
91Health
Library PyPI

importlib_metadata

A backport and reference implementation of Python's importlib.metadata for reading package metadata

142
Apache 2.0
Used by 13
83Health
Library Cargo

globset

A Rust crate for matching one or more glob patterns against a path simultaneously

69,389
Other
Used by 12

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