Responsee is an open source responsive CSS framework based on 12-column grid. Websites based on Responsee are fully responsive – they display content correctly on each type of devices.
Matter is a tiny collection of UI components.
MUI is a lightweight HTML/CSS/JS framework that follows Google’s Material Design guidelines.
Kube is a minimalistic Web framework for professional developers and designers.
Scally is a Sass-based, BEM, OOCSS, responsive ready, CSS framework that provides you with a solid foundation for building reusable UI’s quickly
A Material Design CSS only framework
Tacit is a CSS framework for dummies, who want their web services look attractive but have almost zero skills in graphic design.
Crumpet is a deliciously simple SASS/SCSS responsive framework that keeps your HTML clean & stays out of your way.
yeti.css is a pattern library consisting of lightweight, reusable modules. It has been built to reflect &yet’s visual and branding guidelines.
Flexible Grid System is a Responsive CSS Framework (CSS, Sass, LESS and Stylus)
Wisteria.css is a class selectors based harmless CSS library.