HTML5 Boilerplate is described as 'A rock-solid default for HTML5 awesome. HTML5 Boilerplate is the professional badass's base HTML/CSS/JS template for a fast, robust and future-proof site' and is an website in the Development category. There are more than 10 alternatives to HTML5 Boilerplate, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and BSD. The best alternative is Materialize, which is both free and Open Source. Other great sites and apps similar to HTML5 Boilerplate are Material Bread (Free, Open Source), MUI (Free, Open Source), Flat UI Pro (Paid) and HTML KickStart (Free).
Flat UI Pro is made on the basis of Twitter Bootstrap in a stunning flat-style, and the kit also includes a PSD version for designers. Flat UI Pro contains a huge number of basic components, icons and glyphs.
The 960 Grid System is an effort to streamline web development workflow by providing commonly used dimensions, based on a width of 960 pixels. There are two variants: 12 and 16 columns, which can be used separately or in tandem.