Hand-crafted lightweight Rest Client for testing APIs. Supports collections, environments, git collaboration and local storage.

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

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

Easy-to-use website monitoring and uptime monitoring service in one

Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

Built for developers and testers alike, SoapUI is the only open source tool that covers the entire testing spectrum (functional, security, load, mocking).