Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
Category
Sort:Used by Most Apps
Playwright
Cross-browser end-to-end web testing and browser automation with a single API for Chromium, Firefox, and WebKit.
React Testing Library
Simple and complete React DOM testing utilities that encourage good testing practices.
jest-dom
Custom Jest matchers for asserting on the state of the DOM in your tests.
jest
Delightful JavaScript testing with zero-config setup, snapshots, mocking, and coverage
user-event
Simulates the full sequence of real browser events so Testing Library tests behave the way an actual user does.
testify
The essential Go toolkit for assertions, mocks, and structured test suites.
pytest
The Python testing framework that makes writing small tests easy and scales to complex functional test suites.
DOM Testing Library
Simple, framework-agnostic DOM query utilities that test your UI the way real users interact with it.
Storybook
The industry-standard workshop for building, documenting, and testing UI components in isolation, across every major frontend framework.
tempfile
A secure, cross-platform Rust library for temporary files and directories that clean up automatically on drop.
MSW (Mock Service Worker)
Seamless REST and GraphQL API mocking for browser and Node.js
Prisma Client
Auto-generated, type-safe database client for Node.js and TypeScript.
Puppeteer
Node.js library for automating Chrome and Firefox over the DevTools Protocol and WebDriver BiDi
Cypress
Fast, easy, and reliable end-to-end and component testing for anything that runs in a browser.
PHPUnit
The de facto standard, programmer-oriented unit testing framework for PHP.
mocha
The classic, battle-tested JavaScript test framework for Node.js and the browser, built around flexible async testing and pluggable reporters.
go-cmp
A safer, more powerful alternative to reflect.DeepEqual for comparing Go values in tests.
Chai
BDD/TDD assertion library for Node.js and the browser, framework-agnostic
testcontainers-go
Programmatically spin up disposable Docker containers for Go integration and smoke tests, then tear them down automatically.
testcontainers-node
Spin up disposable Docker containers to run real databases, brokers, and browsers in your Node.js tests.
serial_test
Attribute macros that serialize or parallelize Rust tests via named locks.
go-grpc-middleware
A collection of reusable gRPC interceptors for Go covering auth, logging, retries, validation, and recovery.
go-sqlmock
A mock sql/driver implementation for Go that simulates database behavior in tests without a real database connection.
GSAP
The industry-standard JavaScript animation library for tweening CSS, SVG, canvas, and UI with rock-solid cross-browser reliability.
