When beginning a new web design or mobile app project, it’s always a good idea to begin with a wireframe. The purpose of a wireframe is to communicate the layout of a page without getting caught up in color and design elements. Wireframes can be a big time saver as they help all parties involved come to an agreement on placement of major page elements such as headers, content areas, navigation menus, and footers. The key is to get the layout nailed down so major layout changes won’t take place once detailed design elements are in place. To help you in this, we’ve gathered 18 Free UI and Wireframe Kits that will help you speed up the design process.