You’ll remember HTML5 Boilerplate, is a HTML/CSS/JS default template which helps the website to-be-built work cross-browser, support HTML5-CSS3 and work fast.
Initializr is a generator based on HTML5 Boilerplate that helps you to customize this starter template. Initializr will generate for you a clean customizable template based on Boilerplate with just what you need to start.
P.S. The template has some functionalities removed from Boilerplate to focus on what most people use.