Apps similar to Foundation include Bootstrap, which is free and open source. Other options are Tailwind CSS, Semantic UI, Bulma and Material UI. You're spoiled for choice with CSS Frameworks like Foundation: we list more than 50 alternatives for the web, self-hosting, Mac, Windows and Linux.
Juiced has many of the same layout features that you know and love, but improves upon them with better mobile targeting, custom column ordering, better alignment options, understandable HTML, and less boilerplate styles.
Webments is a collection of libre frameworks designed with scratch CSS using different design languages.
inuit.css is a lightweight, constantly updated CSS framework which provides you with a pragmatic and feature-rich starting point for all your projects.
Simple. Robust. Responsive. Flexible.
Based on Flexbox (CSS Flexible Box Layout Module), Gridlex is a very simple css grid system to quickly create modern layouts and submodules.
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Little Widgets is a collection of beautifully designed HTML website widgets and popups. It’s coded, responsive, animated and ready to use on your website.
The Goldilocks Approach to Responsive Web Design - A good starting point for design that takes device resolution out of the equation.
Wing is a minimal CSS framework that provides a base of styles, and you don't even need to learn a gazillion class names, all of your elements will be styled automatically. Wing is only 4kb minified.
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