Cypress : JavaScript End to End Testing Framework. Fast, easy and reliable testing for anything that runs in a browser.
Phantomas : PhantomJS-based web performance metrics collector and monitoring tool
Zed Attack Proxy : The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding vulnerabilities in web applications.
It is designed to be...
WebScarab : WebScarab is a framework for analysing applications that communicate using the HTTP and HTTPS protocols.
Hoppscotch : A free, online, open source API request builder
BackstopJS automates visual regression testing of your responsive web UI by comparing DOM screenshots over time.