The Semantic Grid System is described as 'Set column and gutter widths, choose the number of columns, and switch between pixels and percentages' and is an website in the development category. There are more than 50 alternatives to The Semantic Grid System, not only websites but also apps for a variety of platforms, including Self-Hosted, Mac, Windows and Linux apps. The best The Semantic Grid System alternative is Bootstrap, which is both free and Open Source. Other great sites and apps similar to The Semantic Grid System are Tailwind CSS, Foundation, Material UI and Materialize.