The Big List of Naughty Strings is a list of strings which have a high probability of causing issues when used as user-input data.

Design, debug, and test APIs locally or in the cloud

Mockoon is the easiest and quickest way to design and run mock REST APIs.

Browser and Mobile Automation Test Framework for Node.js

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

Professional software tool for HTTP testing and debugging