📦 Parcel : Blazing fast, zero configuration web application bundler
Babel : Babel will turn your ES6+ code into ES5 friendly code, so you can start using it right now without waiting for browser support.
PurgeCSS : PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.
Prepack : Prepack is a tool that optimizes JavaScript source code: Computations that can be done at compile-time instead of run-time get eliminated. Prepack rep...
CSS Sprite Generator : This tool allows you to automate the process of generating CSS sprites. Simply give it a ZIP file containing 2 or more images (GIF, PNG or JPG) and it...
Compass is an open-source CSS Authoring Framework.