Programming Collections

Atoms contain the source of truth for our application state. In our todo-list, the source of truth will be an array of objects, with each object representing a todo item.

Bring your components to life with simple spring animation primitives for React

Completely unstyled, fully accessible UI components, designed to integrate beautifully with Tailwind CSS.

Free IP Geolocation API - lookup any IP address

Testim is an automated testing platform for fast authoring of AI-powered stable tests and tools to help you scale quality. Free account.

The leading provider of test coverage analytics. Ensure that all your new code is fully covered, and see coverage trends emerge. Works with most CI services. Always free for open source.

Codacy | The easiest way to ensure your team is writing high quality code. It's a static analysis tool designed to analyze more than 40 languages such as Javascript, Python, Java, Ruby, and PHP.

GIT utilities -- repo summary, repl, changelog population, author commit percentages and more - tj/git-extras

Recall what you did on the last working day. Psst! or be nosy and find what someone else in your team did ;-) - kamranahmedse/git-standup

Software Licenses in Plain English

The style guide is being deprecated! For CSS docs, please see: https://primer.style/css

A modular, lightweight, performant, accessible and extensible drag & drop toolkit for React.

Pure CSS icons library, Customizable & Retina-Ready built 100% in pure CSS, SVG, SVG Sprite, styled-components, Figma and Adobe XD. Easy integration: Embed, NPM & API

Nucleo is a beautiful library of 20000+ icons, and a powerful application to collect, customize and export all your icons.

Capture and inspect HTTP requests Hookbin is a free service that enables you to collect, parse, and view HTTP requests. Create your unique endpoints to inspect headers, body, query strings, cookies, uploaded files, and much more. This service is brought to you by Pixaven — modern GPU-powered image processing API

The Big List of Naughty Strings is a list of strings which have a high probability of causing issues when used as user-input data. - minimaxir/big-list-of-naughty-strings

React Rainbow is a collection of components that will reliably help you build your application in a snap. Give it a hack and let us know what you think.

Get an HTTP endpoint to build mock APIs. Beeceptor intercepts HTTP requests for you to mock in real-time. Create rules to simulate a slow API.

Animista is a place where you can play with a collection of ready to use CSS animations, tweak them and download only those you will actually use.

An emoji guide for your commit messages.

A heads up display for git. Contribute to michaeldfallen/git-radar development by creating an account on GitHub.

reg-suit is a tool suit for visual regression testing.

A tool for developing responsive websites crazy-fast. Preview changes on multiple devices instantly.

React hook for managing form and inputs state

A pack of more than 480 beautifully crafted Open Source icons. SVG, Sketch, Web Font and Animations support. - akveo/eva-icons

Try running Puppeteer / Headless Chrome scripts in the cloud in this free playground. Puppeteer is great for web scraping, E2E testing and monitoring.

Headless browser automation built for developers

Monitor the performance and correctness of your API endpoints & vital site transactions from a single, simple dashboard

Prevent JS libraries bloat. If you accidentally add a massive dependency, Size Limit will throw an error. - ai/size-limit