Prettier : Prettier is an opinionated code formatter. It enforces a consistent style by parsing your code and re-printing it with its own rules that take the max...
Autoprefixer : PostCSS plugin to parse CSS and add vendor prefixes to CSS rules using values from Can I Use.
csscss : csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.
YAML Builder : A tool for visual layout development of YAML based CSS layouts
PurgeCSS : PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.