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

51Health
Library PyPI

pytube

A lightweight, dependency-free Python library for downloading YouTube videos

13,194
Other
Used by 3
91Health
Tool PyPI

PyInstaller

Bundle a Python application and all its dependencies into a single standalone package or executable.

13,130
Other
Used by 3
96Health
Framework npm

aws-cdk

The core AWS CDK v2 construct library for defining cloud infrastructure as code and deploying it via CloudFormation.

12,949
Apache 2.0
Used by 3
91Health
Library Cargo

iroh

A peer-to-peer networking library that dials public keys instead of IP addresses over QUIC

12,807
Apache 2.0
Used by 3
84Health
Framework Composer

Slim Framework

A lightweight PHP micro framework for building fast web applications and APIs

12,278
MIT
Used by 3
43Health
Library PyPI

schedule

In-process Python job scheduling with a friendly, readable syntax for running functions on a fixed cadence.

12,268
MIT
Used by 3
81Health
Library npm

antd-mobile

Essential React UI component library for building mobile web apps

12,078
MIT
Used by 3
52Health
Library npm

react-slick

A faithful React port of the jQuery Slick Carousel, giving React apps swipeable, responsive, infinitely-loopable sliders.

11,911
MIT
Used by 3
92Health
Library PyPI

statsmodels

Statistical modeling and econometrics in Python, with rigorous estimation and inference.

11,708
BSD 3
Used by 3
49Health
Library Composer

EmailValidator

RFC-compliant email address validation for PHP with DNS, spoof, and strictness checks

11,639
MIT
Used by 3
53Health
Library npm

fp-ts

Typed functional programming patterns and data types for TypeScript

11,547
MIT
Used by 3
74Health
Library Go

Bleve

A modern Go library for full-text, numeric, geospatial, and vector search and indexing.

11,240
Apache 2.0
Used by 3
92Health
Framework Cargo

Thrift

Cross-language RPC framework with a Rust crate for interoperable clients and servers.

10,959
Apache 2.0
Used by 3
90Health
Framework PyPI

Hydra

A Python framework for elegantly configuring complex applications through composable hierarchical configs.

10,715
MIT
Used by 3
94Health
Tool Go

Distribution

The OCI-compliant, self-hosted container registry toolkit powering Docker Hub, GHCR, and GitLab Registry.

10,662
Apache 2.0
Used by 3
77Health
Library PyPI

llama-cpp-python

Python bindings for llama.cpp to run local LLMs with an OpenAI-compatible API

10,656
MIT
Used by 3
84Health
Library PyPI

django-allauth

Integrated Django app for authentication, registration, and social login

10,379
MIT
Used by 3
75Health
Library npm

valtio

Proxy-based state management for React and vanilla JavaScript with automatic render optimization.

10,243
MIT
Used by 3
62Health
Library Go

Watermill

A Go library for building event-driven applications with a unified Pub/Sub API across Kafka, RabbitMQ, NATS, SQL, and more.

9,927
MIT
Used by 3
67Health
Library PyPI

re2

A fast, safe Python binding for Google's RE2 regular expression engine, offering a near drop-in replacement for the re module with a linear-time matching guarantee.

9,827
BSD 3
Used by 3
76Health
SDK Composer

Google API Client Library for PHP

The official PHP client for calling Google APIs like Gmail, Drive, YouTube, and Sheets with built-in OAuth 2.0 auth handling.

9,812
Apache 2.0
Used by 3
85Health
Framework PyPI

ModelScope

Alibaba's open model-hub library for NLP, CV, speech, and multi-modal AI models.

9,185
Apache 2.0
Used by 3
72Health
Library Go

raft

A battle-tested Go library implementing the Raft consensus protocol for replicated, fault-tolerant state machines.

9,151
MPL-2.0
Used by 3
52Health
Library Go

kafka-go

A high-performance, idiomatic Go client library for reading and writing Kafka messages, built without cgo dependencies.

8,637
MIT
Used by 3

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