Grunt - The Grunt ecosystem is huge and it's growing every day.

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.

Brunch - Brunch builds, lints, compiles, concatenates and shrinks your HTML5 app in an ultra-simple way. No more Grunt / Gulp mess.

Parcel - Blazing fast, zero configuration web application bundler

Goat 2 Meeting - Invite a real goat (or llama) to your next video call