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ESLint
The pluggable linting utility for JavaScript and JSX
Used in:
react, jscodeshift, fbjs and 16 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
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Jest
🃏Delightful JavaScript Testing
Used in:
react, jscodeshift, create-react-app and 12 others
Backers:
Frontend Masters ($6K), Principal Financial Group ($2K), Bugsnag Stability Monitoring ($2K) and 7 others
Yearly budget: $9,295 USD
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Prettier
Prettier is an opinionated code formatter.
Used in:
react, fbjs, create-react-app and 12 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
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Babel
Babel is the community maintained compiler for evolving the future of JavaScript
Used in:
react, regenerator, jscodeshift and 11 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
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Sindre Sorhus
Full-Time Open-Sourcerer
Used in:
react, create-react-app, prop-types and 7 others
Backers:
Retool ($7K), GatsbyJS ($5K), Strapi ($3K) and 7 others
Yearly budget: $30,807 USD
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Husky
Modern native Git hooks made easy 🐶 woof!
Used in:
create-react-app, idx, docusaurus and 6 others
Backers:
Padlet ($1000), Skyscanner ($928), GitKraken ($800) and 7 others
Yearly budget: $5,712 USD
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lint-staged
improve developer experience and code quality for teams
Used in:
create-react-app, idx, docusaurus and 6 others
Backers:
Skyscanner ($928), Easy Agile ($500), Tripwire, Inc. ($30) and 2 others
Yearly budget: $2,310 USD
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Rollup
The JavaScript module bundler
Used in:
react, facebook-nodejs-business-sdk, ristretto255-js and 3 others
Backers:
Aragon ($3K), Oasis Digital Solutions Inc. ($2K), Frontend Masters ($2K) and 7 others
Yearly budget: $9,430 USD
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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
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gulp
A toolkit to automate & enhance your workflow
Used in:
react, facebook-nodejs-business-sdk, fbt
Backers:
Vertigo Studio SRL ($4K), Sticker Mule ($4K), Frontend Masters ($4K) and 7 others
Yearly budget: $10,139 USD
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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
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Create React App
Set up a modern web app by running one command.
Used in:
react, lexical
Backers:
Frontend Masters ($1000), Touchless ($75), CodeFund ($48) and 2 others
Yearly budget: $349 USD
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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
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psutil
Cross-platform lib for process and system monitoring in Python
Used in:
TestSlide, sapp
Yearly budget: $28 USD
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debug
We are on a mission to maintain the `visionmedia/debug` JavaScript debugging module
Used in:
metro
Backers:
CodePilot.ai ($200), Howdy ($100), Triplebyte ($50) and 3 others
Yearly budget: $1,767 USD
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Docusaurus
Easy to Maintain Open Source Documentation Websites
Used in:
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
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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
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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.
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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
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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
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IPython
IPython is an enhanced interactive Python environment aimed at maximizing productivity in workflows that combine data, computation and exploratory programming.
Used in:
sapp
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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
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Konva
Making better 2d canvas framework
Used in:
haptics-studio
Backers:
Elegance ($50)
Yearly budget: $117 USD
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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.
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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
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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
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pnpm
build a great package manager
Used in:
lexical
Backers:
Bit ($4K), SheetJS ($200), exidia s.p.r.l. ($100) and 1 other
Yearly budget: $4,564 USD
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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
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react-hot-loader
Tweak React components in real time!
Used in:
haptics-studio
Backers:
Orbit ($2K), GatsbyJS ($1000), ScrapingBee ($55) and 1 other
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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
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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
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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
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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
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unified
Content as structured data
Used in:
react-native-cdp-status
Backers:
Vercel ($25K), GatsbyJS ($24K), Netlify ($10K) and 7 others
Yearly budget: $16,676 USD
43% progress to reach their next goal:
1 FT maintainer
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chalk
Used in:
react, create-react-app, metro and 3 others
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.
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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:
create-react-app, 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.
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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