Requestly is an open-source tool that simplifies API development, testing, mocking, and integration for developers and QAs.

Vigil is an open-source Status Page you can host on your infrastructure, used to monitor all your servers and apps, and visible to your users.

Hoppscotch is an open-source API development ecosystem that helps you create and test your API requests saving precious time in development.

Uptime Kuma is an easy-to-use self-hosted monitoring tool.

Browser and Mobile Automation Test Framework for Node.js

Percy is a visual testing and monitoring tool that focuses on detecting visual changes in web applications