* { 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.
📦 Parcel : Blazing fast, zero configuration web application bundler
PurgeCSS : PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.
mirador : Mirador is a tool for visual exploration of complex datasets. It enables users to discover correlation patterns and derive new hypotheses from the dat...
csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.