UIkit is a lightweight and modular front-end framework for developing fast and powerful web interfaces. It comes with a wide range of reusable and combinable components. All UIkit classes are namespaced, so they won't interfere with other frameworks and extensions you might be using.
You can now easily create modals, lightboxes, tooltips, sliders, switches, lists, tabs, accordions, sticky elements, parallax effects and many, many other cool things!