Superplate - The frontend boilerplate with superpowers
Webpacker - Use Webpack to manage app-like JavaScript modules in Rails - rails/webpacker
Webpack - Webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.
Maid - Be lazy. Let Maid clean up after you, based on rules you define.
Basecamp - A simple and elegant project management system.
Parcel - Blazing fast, zero configuration web application bundler