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✅ The Node.js best practices list (July 2026)

JavaScript API for Chrome and Firefox

Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.

Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline

Delightful JavaScript Testing.

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

A toolkit with common assertions and mocks that plays nicely with the standard library

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)

Learn Go with test-driven development

☕️ Classic, reliable, trusted test framework for Node.js and the browser

Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

Node.js test runner that lets you develop with confidence 🚀

A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)

JavaScript Testing utilities for React

🐐 Simple and complete React DOM testing utilities that encourage good testing practices.

GoReplay is an open-source tool for capturing and replaying live HTTP traffic into a test environment in order to continuously test your system with real data. It can be used to increase confidence in code deployments, configuration changes and infrastructure changes.

Faker is a Python package that generates fake data for you.

Hurl, run and test HTTP requests with plain text.