BackYourStack: Discover the Open Source projects you are using and need financial support.

ESLint

The pluggable linting utility for JavaScript and JSX

Used in:
jscodeshift, fbjs, idx and 11 others

Backers:
Meta Open Source ($53,000 since Aug 2025). Also: Github Sponsors ($27K), Shopify ($21K), Automattic ($20K) and 7 others

Yearly budget: $146,397 USD

89% progress to reach their next goal:
Amount to sustain ESLint for the foreseeable future

Contribute

Babel

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

Used in:
regenerator, jscodeshift, fbjs and 8 others

Backers:
Meta Open Source ($34,000 since May 2021). Also: Handshake ($100K), trivago ($48K), Frontend Masters ($33K) and 7 others

Yearly budget: $255,680 USD

44% progress to reach their next goal:
3 maintainers

Contribute

Prettier

Prettier is an opinionated code formatter.

Used in:
fbjs, idx, docusaurus and 7 others

Backers:
Meta Open Source ($49,000 since Dec 2025). Also: Frontend Masters ($11K), Shogun Labs, Inc. ($1K), InVision AG ($1K) and 7 others

Yearly budget: $27,520 USD

Contribute

Jest

🃏Delightful JavaScript Testing

Used in:
jscodeshift, prop-types, fbt and 6 others

Backers:
Frontend Masters ($6K), Principal Financial Group ($2K), Bugsnag Stability Monitoring ($2K) and 7 others

Yearly budget: $9,295 USD

Contribute

Sindre Sorhus

Full-Time Open-Sourcerer

Used in:
prop-types, docusaurus, Rapid and 4 others

Backers:
Retool ($7K), GatsbyJS ($5K), Strapi ($3K) and 7 others

Yearly budget: $30,807 USD

Contribute

Husky

Modern native Git hooks made easy 🐶 woof!

Used in:
idx, docusaurus, lexical and 3 others

Backers:
Padlet ($1000), Skyscanner ($928), GitKraken ($800) and 7 others

Yearly budget: $5,712 USD

Contribute

lint-staged

improve developer experience and code quality for teams

Used in:
idx, docusaurus, lexical and 3 others

Backers:
Skyscanner ($928), Easy Agile ($500), Tripwire, Inc. ($30) and 2 others

Yearly budget: $2,310 USD

Contribute

Rollup

The JavaScript module bundler

Used in:
facebook-nodejs-business-sdk, ristretto255-js, lexical and 2 others

Backers:
Aragon ($3K), Oasis Digital Solutions Inc. ($2K), Frontend Masters ($2K) and 7 others

Yearly budget: $9,430 USD

Contribute

Chai

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

Used in:
facebook-nodejs-business-sdk, Rapid, zapier-shops-orders

Backers:
Principal Financial Group ($2K), CodePilot.ai ($250), Metabolize ($84) and 7 others

Yearly budget: $1,500 USD

Contribute

chalk

Used in:
docusaurus, Rapid, memlab

At least one person (or organization) already pledged to this project on Open Collective. You can add your pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

webpack

webpack is THE build solution for modern web applications.

Used in:
fbt, memlab, haptics-studio

Backers:
trivago ($390K), AG Grid ($120K), Frontend Masters ($39K) and 7 others

Yearly budget: $306,753 USD

33% progress to reach their next goal:
50% Payouts

Contribute

Docusaurus

Easy to Maintain Open Source Documentation Websites

Used in:
docusaurus, lexical

Backers:
Meta Open Source ($14,969 since Apr 2020). Also: Smudge ($2K), Temporal Technologies ($206), ScrapingBee ($115) and 4 others

Yearly budget: $3,350 USD

Contribute

gulp

A toolkit to automate & enhance your workflow

Used in:
facebook-nodejs-business-sdk, fbt

Backers:
Vertigo Studio SRL ($4K), Sticker Mule ($4K), Frontend Masters ($4K) and 7 others

Yearly budget: $10,139 USD

Contribute

Mocha

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

Used in:
regenerator, Rapid

Backers:
clay ($22K), Icons8: free icons, photos, illustrations, and music ($10K), Localize ($9K) and 7 others

Yearly budget: $18,894 USD

Contribute

pnpm

build a great package manager

Used in:
docusaurus, lexical

Backers:
Bit ($4K), SheetJS ($200), exidia s.p.r.l. ($100) and 1 other

Yearly budget: $4,564 USD

Contribute

psutil

Cross-platform lib for process and system monitoring in Python

Used in:
TestSlide, sapp

Yearly budget: $28 USD

Contribute

Create React App

Set up a modern web app by running one command.

Used in:
lexical

Backers:
Frontend Masters ($1000), Touchless ($75), CodeFund ($48) and 2 others

Yearly budget: $349 USD

Contribute

electron

Build cross platform desktop apps with JavaScript, HTML, and CSS

Used in:
haptics-studio

Backers:
Frontend Masters ($3K), White Label Communications ($3K), Triplebyte ($2K) and 7 others

Yearly budget: $1,879 USD

Contribute

eslint-plugin-compat

Lint the browser compatibility of your code

Used in:
lexical

Backers:
Triplebyte ($75)

Contribute

Express

Used in:
haptics-studio

At least one person (or organization) already pledged to this project on Open Collective. You can add your pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

faker.js

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

Used in:
haptics-studio

Backers:
Retool ($4K), Retool ($2K), Algolia ($600) and 7 others

Yearly budget: $17,798 USD

Contribute

html-webpack-plugin

Simplifies creation of HTML files with Webpack

Used in:
haptics-studio

Backers:
Tipe ($2K), Principal Financial Group ($2K), Frontend Masters ($50) and 6 others

Yearly budget: $931 USD

Contribute

IPython

IPython is an enhanced interactive Python environment aimed at maximizing productivity in workflows that combine data, computation and exploratory programming.

Used in:
sapp

Contribute

JSS

JSS is an authoring tool for CSS which uses JavaScript as a host language.

Used in:
haptics-studio

Backers:
CodeFund ($981), Modern Treasury ($700), BuySellAds ($262) and 7 others

Yearly budget: $1,166 USD

20% progress to reach their next goal:
Maintenance Cost

Contribute

Konva

Making better 2d canvas framework

Used in:
haptics-studio

Backers:
Elegance ($50)

Yearly budget: $117 USD

Contribute

Lodash

Used in:
haptics-studio

At least one person (or organization) already pledged to this project on Open Collective. You can add your pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

Moment.js

Used in:
haptics-studio

At least one person (or organization) already pledged to this project on Open Collective. You can add your pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

nock

HTTP mocking and expectations library for Node.js

Used in:
zapier-shops-orders

Backers:
Third Iron ($124), CodeFund ($48), Metabolize ($34) and 7 others

Yearly budget: $188 USD

58% progress to reach their next goal:
Accountable Community Management

Contribute

NumPy

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).

Used in:
FAI-PEP

Backers:
NumFOCUS ($2K)

Yearly budget: $2,000 USD

Contribute

react-dropzone

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

Used in:
haptics-studio

Backers:
PQINA ($1000), Open Collective ($75), Thinkmill ($5) and 1 other

Yearly budget: $835 USD

Contribute

react-hot-loader

Tweak React components in real time!

Used in:
haptics-studio

Backers:
Orbit ($2K), GatsbyJS ($1000), ScrapingBee ($55) and 1 other

Contribute

react-select

Used in:
haptics-studio

At least one person (or organization) already pledged to this project on Open Collective. You can add your pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

sinon

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

Used in:
Rapid

Backers:
BitMEX ($2K), Mixmax ($2K), BuySellAds ($2K) and 7 others

Yearly budget: $5,679 USD

Contribute

socket.io

We are on a mission to enable real-time bidirectional communication on every platform.

Used in:
haptics-studio

Backers:
Casino Topp ($4K), VPS Server ($3K), Ramotion ($3K) and 7 others

Yearly budget: $162,522 USD

Contribute

stylelint

A mighty, modern CSS linter

Used in:
docusaurus

Backers:
InVision AG ($2K), Skyscanner ($928), Codecademy ($900) and 7 others

Yearly budget: $1,914 USD

Contribute

Symfony Diversity collective

The Symfony PHP framework Diversity Initiative

Used in:
facebook-php-business-sdk

Backers:
Algolia ($151), Etny B.V. ($50), Omines Internetbureau B.V. ($20) and 2 others

Yearly budget: $50 USD

Contribute

axios

Used in:
facebook-nodejs-business-sdk, zapier-shops-orders, haptics-studio

To our knowledge, this project is not on Open Collective or other funding platform. You can create a pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

lerna

Used in:
idx, docusaurus

To our knowledge, this project is not on Open Collective or other funding platform. You can create a pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

karma

Used in:
Rapid

To our knowledge, this project is not on Open Collective or other funding platform. You can create a pledge. This will incentivize them to start collecting money to fund their activities.

Pledge

winston

Used in:
haptics-studio

To our knowledge, this project is not on Open Collective or other funding platform. You can create a pledge. This will incentivize them to start collecting money to fund their activities.

Pledge