Pa11y : Monitor the accessibility of your websites with pa11y-dashboard, and protect against accessibility errors creeping into your codebase.
webhint : webhint is a linting tool that will help you with your site's accessibility, speed, security and more, by checking your code for best practices and co...
HyperTerm : A terminal built on web technologies : JS / HTML / CSS
Galen Framework : Automated testing of look and feel for your responsive websites.
Layout testing seemed always a complex task. Galen Framework offers a simple solution...
Mink : Mink is an open source acceptance test framework for web applications, written in PHP 5.3.
Diagnostic.css is a stylesheet which allows the user to test for common errors in a page's markup.