Which Wordpress Theme Framework you use for creating premium wordpress themes?


I want to create my first premium wordpress theme. I started checking some existing wordpress theme frameworks or boilerplates.

Which wordpress theme framework you use for creating wordpress themes?


I not created yet. I am looking for options. There are lots of starter theme frameworks like _s (underscore) , WP Emerge , Sage etc. I just want to check which starter framework/theme authors use for creating themes.