Cypress is a next generation front end testing tool built for the modern web. They address the key pain points developers and QA engineers face when testing modern applications
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
k6 is an open-source tool and cloud service that makes load testing easy for developers and QA engineers
Artillery is an open-source performance & reliability testing suite for developers & SREs
SoapUI is the world's most widely-used automated testing tool for SOAP and REST APIs. Write, run, integrate, and automate advanced API Tests with ease.
curl is used in command lines or scripts to transfer data. curl is also used in cars, television sets, routers, printers, audio equipment, mobile phones, tablets, settop boxes, media players and is the Internet transfer engine for thousands of software applications in over ten billion installations.