Groundwork is a powerful, flexible and responsive frontend framework which allows you to create responsive designs which work basically on any device.
Groundwork is built using SASS and Compass. It provides a great grid system which allows you to use any columns fraction amount from halves to twelfths.
Groundwork allows you to do rapid prototyping of designs which will fit any screen size from handheld devices like mobile phones to large devices like televisions.
Groundwork comes with custom styling for buttons, forms, has UI components baked in navigational menus, tabs, tooltips and more. It also uses Font Awesome as default icon web font.
Groundwork works in all major browsers like Chrome, Firefox IE, Opera and Safari.