PostHog

Prettier is an opinionated code formatter.

Modern native Git hooks made easy 🐶 woof!

improve developer experience and code quality for teams

The pluggable linting utility for JavaScript and JSX

Babel is the community maintained compiler for evolving the future of JavaScript

A seamless REST/GraphQL API mocking library for JavaScript applications.

Set up a modern web app by running one command.

2KB immutable date library alternative to Moment.js with the same modern API

Moved collective to https://opencollective.com/gatsbyjs

simple, flexible, fun javascript test framework for node.js & the browser.

Keeping browsers diversity in front-end tools

Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.

Modern JavaScript date utility library

Lint the browser compatibility of your code

Build forms in React, without the tears 😭

A robust, performance-focused and full-featured Redis client for Node.js that supports Sentinel and Cluster. Works in NodeJS, Electron platforms.

Visual primitives for the component age. Use the best bits of ES6 and CSS to style your apps without stress 💅

Supabase Javascript Client Libraries

Content as structured data

Python's most depended-on HTTP client library

The fastest JSON Schema Validator. Supports draft-04/06/07/2019-09/2020-12

This is a repository for collecting global custom management extensions for the Django Framework.

Continue to make faker.js the best open-source fake data solution available.

🐛🔨 Property based testing framework for JavaScript (like QuickCheck) written in TypeScript

Accessible, progressive image zooming for the web

Kea makes state management in React simple, functional and amazing!

The most lightweight, customizable React markdown component.

A lightweight library for converting complex objects to and from simple Python datatypes.

The transparent reactive programming library

HTTP mocking and expectations library for Node.js

A tiny task scheduler in pure JavaScript for node.js

Nodemon is a utility that will monitor for any changes in your source and automatically restart your server. Perfect for rapid development.

The fundamental package for scientific computing with Python. IMPORTANT: we are still setting up this collective, and cannot accept donations yet (as of 30 April 2021).

The positioning engine for all your tooltip and popover needs

3kb alternative to React with the same ES6 API.

The pytest framework makes it easy to write small tests, yet scales to support complex functional testing

Help us on our mission to deliver the best day picker package for react!

We're on our mission to simplify drag'n'drop for files in React applications.

We are on a mission to create best carousel component in reactjs

Redefined chart library built with React and D3

SciPy (pronounced “Sigh Pie”) is a Python-based ecosystem of open-source software for mathematics, science, and engineering.

We provide the most widely used stubbing library for JavaScript with ~3M weekly downloads

The development environment you'll love to use

Reset CSS for Styled Components

SymPy is a library for symbolic mathematics, which means performing mathematical calculations exactly.

webpack is THE build solution for modern web applications.