Groundwork - interesting CSS / HTML5 UI framework
Furrowing the vastness of the “boundless”, I came across an interesting CSS / HTML5 UI framework - Groundwork. According to its developers, it has one of the most advanced responsive templates in the world. Thanks to the incredible flexibility of the framework, you can get sites that meet the most modern requirements.
A quick inspection found: 5 ready-made responsive templates, a fluid-grid, a set of components with styles (Buttons, Messages, Navigation, Tabs, Data Tables, Forms, Tooltips, Orbit).
Groundwork is on open source Github. License - Apache License.