* { 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.
PurgeCSS : PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.
Sizzy : A tool for developing responsive websites crazy-fast.
Open sourced : https://github.com/kitze/sizzy
WhatWeb : WhatWeb identifies websites. Its goal is to answer the question, “What is that Website?”. WhatWeb recognises web technologies including content manage...
csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.
