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

94Health
Tool npm

typescript-eslint

The official meta-package bundling the TypeScript ESLint parser, plugin, and rule presets behind a single typed config() helper.

16,401
MIT
Used by 260
93Health
Tool npm

@vitejs/plugin-react

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

1,167
MIT
Used by 211
68Health
Tool npm

eslint-config-prettier

Disables ESLint stylistic rules that conflict with Prettier, so the two tools never fight over formatting.

5,893
MIT
Used by 169
81Health
Tool npm

esbuild

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

40,071
MIT
Used by 139
61Health
Tool npm

eslint-plugin-react

React-specific linting rules for ESLint that catch JSX bugs, enforce Hooks conventions, and keep prop usage consistent.

9,293
MIT
Used by 122
95Health
Tool npm

Storybook

The industry-standard workshop for building, documenting, and testing UI components in isolation, across every major frontend framework.

91,163
MIT
Used by 90
91Health
Tool PyPI

Uvicorn

A lightning-fast ASGI server for Python, built on uvloop and httptools.

10,993
BSD 3
Used by 83
90Health
Tool npm

Oxlint

Rust-based JavaScript/TypeScript linter that runs 50-100x faster than ESLint, with zero configuration required.

22,902
MIT
Used by 70
56Health
Tool npm

eslint-plugin-jsx-a11y

Static ESLint rules that catch JSX accessibility issues before code ships.

3,621
MIT
Used by 65
90Health
Tool npm

SWC

Rust-based JavaScript/TypeScript compiler, a drop-in super-fast alternative to Babel

34,208
Apache 2.0
Used by 56
90Health
Tool PyPI

Ruff

An extremely fast Python linter and code formatter, written in Rust, built as a drop-in replacement for Flake8, Black, isort, and dozens of plugins.

49,811
MIT
Used by 46
58Health
Tool npm

Create React App

Zero-configuration CLI that bootstraps a React single-page app in one command

103,249
MIT
Used by 33
88Health
Tool PyPI

Gunicorn

A fast, lightweight pre-fork WSGI and ASGI HTTP server for running Python web apps in production on UNIX.

10,686
MIT
Used by 33
94Health
Tool npm

mocha

The classic, battle-tested JavaScript test framework for Node.js and the browser, built around flexible async testing and pluggable reporters.

22,896
MIT
Used by 30
83Health
Tool PyPI

mypy

Optional static type checker that catches Python bugs before you run your code

20,651
MIT
Used by 30
89Health
Tool PyPI

Alembic

Database migrations tool for SQLAlchemy with autogenerate and transactional DDL

4,413
MIT
Used by 27
89Health
Tool npm

shadcn

Add beautifully designed, accessible UI components as owned source code via a CLI

124,711
MIT
Used by 25
83Health
Tool npm

svgo

A Node.js library and command-line tool that optimizes SVG files by removing redundant markup through a configurable plugin pipeline.

22,703
MIT
Used by 23
93Health
Tool npm

nest-cli

Scaffolds, builds, and serves NestJS applications through schematics-driven code generation and pluggable compiler backends.

2,199
MIT
Used by 19
86Health
Tool npm

js-beautify

Reformats and re-indents JavaScript, HTML, and CSS into clean, readable code

8,999
MIT
Used by 11
62Health
Tool npm

jest-junit

A Jest reporter that converts test results into JUnit-compatible XML for CI dashboards and test-analytics tools.

502
Apache 2.0
Used by 11
51Health
Tool PyPI

MkDocs

A fast, simple static site generator for building project documentation from Markdown with a single YAML config file.

22,470
Other
Used by 10
71Health
Tool npm

unplugin-icons

Import any of Iconify's 200,000+ icons as on-demand components across every major bundler and UI framework.

4,941
MIT
Used by 10
92Health
Tool PyPI

isort

Automatically sorts and organizes Python import statements

6,953
MIT
Used by 8

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