UIkit is a lightweight and modular front-end framework for developing fast and powerful web interfaces. UIkit gives you a comprehensive collection of HTML, CSS, and JS components which is simple to use, easy to customize and extendable. UIkit is developed in LESS to write well-structured, extendable code which is easy to maintain.
There is a collection of small, responsive components using consistent and conflict-free naming conventions. UIkit’s very basic style can be extended with themes and is easy to customize to create your own look. UIkit is open source and MIT licensed. It is absolutely free of charge and you can use, copy, merge, publish and distribute the framework without any limitations.