GroundworkCSS is a 100% free and open source responsive HTML5, CSS and JavaScript Framework.
Cost / License
- Free
- Open Source
Application type
Platforms
- Online
- Self-Hosted
Apps similar to Picnic CSS include Bootstrap, which is free and open source. Other options are Tailwind CSS, Bulma, Semantic UI and Foundation. You're spoiled for choice with CSS Frameworks like Picnic CSS: we list more than 50 alternatives for the web, self-hosting, Mac, Windows and Linux.
GroundworkCSS is a 100% free and open source responsive HTML5, CSS and JavaScript Framework.



Responsable is a responsive HTML CSS LESS SCSS framework with clean markup, normalized CSS, and responsive images. It allows for nested columns for easy grid nesting and customization, and provides base styles for forms, tables, and typography for faster startup on your projects.
The Goldilocks Approach to Responsive Web Design - A good starting point for design that takes device resolution out of the equation.
A grid system for responsive web design. Includes folding columns, elastic gutters, a zoomable baseline grid, and a delightful grid overlay script.
Google's front-end web framework for building sites to the Material Design specification.







Less Framework is a CSS grid system for designing adaptive websites. It contains 4 layouts and 3 sets of typography presets, all based on a single grid.
Phonon is a front-end framework made with mobile and desktop in mind. It offers clear and neutral components that integrate best practices and ideas coming from well-known design styles.
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.