Bootstrap - Simple and flexible HTML, CSS, and JS for popular UI components and interactions
Element UI - A Desktop UI Library. Element, a Vue 2.0 based component library for developers, designers and product managers.
Materialize CSS - A modern responsive front-end framework based on Material Design
GenesisUI - Bootstrap Admin Templates on steroids! Collection of premium bootstrap admin templates.
UIKit - A lightweight and modular front-end framework for developing fast and powerful web interfaces
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.