Skeleton
Description: Skeleton is a simple, responsive boilerplate that can be used as a lightweight starting point for web development projects. It provides basic CSS and JS functions for rapid prototyping.
Type: software
Pricing: Open Source
Spectre.css
Description: Spectre.css is a lightweight, responsive and modern CSS framework for faster and extensible development. It has intuitive classes for rapid prototyping and building web interfaces.
Type: software