* { CSS:resetr } : To help you find the perfect CSS-reset styles, CSSresetr lets you try all the best CSS Resets on a variety of web pages – even your own.
Litmus : Test and track your emails. Email previews, analytics and spam filter testing.
tota11y : an accessibility visualization toolkit that aims to reduce the friction of a11y testing
Hurl : Hurl is a command line tool that runs HTTP requests defined in a simple plain text format.
It can chain requests, capture values and evaluate queries ...
