Robot Framework is a generic open source automation framework. It can be used for test automation and robotic process automation (RPA).

Puppeteer is a Node.js library which provides a high-level API to control Chrome/Chromium over the DevTools Protocol.

Free & OpenSource REST API Testing Tool for all levels in a Test Pyramid

Playwright enables reliable end-to-end testing for modern web apps.

ReadyAPI is a low-code API testing platform for development teams that care about creating test automation across any workflow.

Postman is an API platform for building and using APIs. Postman simplifies each step of the API lifecycle and streamlines collaboration so you can create better APIs—faster.