I am using Bedrock Stack and Sage Starter Theme from roots.io
Bedrock is a complete wordpress boilerplate. It implements the 12 factor app methology
So, why it's cool?
If you want to deploy your project simply type cap staging deploy or cap production deploy and you can even sync (pull /push) database and uploads.
Dependencies got managed with composer. If you want to install wp plugins you can simply composer require packagename which is pretty neat!
Sage is a starter sceleton theme. It also comes with a ready to go workflow, which includes:
However I have a fork of it, with some custom addtions. The stack is pretty solid, as it's also generating a manifest.json and hashed assets so you nomrally don't have problems with clearing chache etc.
The Theme Wrapper is also awesome, because you can easily split everything into partials and DRY up your code.
All in all it's a very solid stack which helps you to create a clean codebase and easy workflow. They have also a few awesome plugins like Soil to clean up wp_head()
Jakub
Web Developer