I want to introduce you to a code generation tool we have been working on, it's a code generator scaffolding tool for Drupal8 based on Symfony Console component.
The idea of this project is to provide similar functionality as the Symfony console, providing a CLI scaffolding tool to automate the creation of modules using the terminal to automatically generate the directory structure for controllers, forms, services and required files.
Watch a video here
So. Give it a try and don't be hesitate and post your feedback, feel free to fork & contribute
We are currently planning generate & edit twig files directly from Drupal 8 UI and generate Unit Test for Controllers.