FlatBox

A beautifully FlatBox with 8 flat design color schemes. It aslo a responsive theme, you can use in mobile, ipad or desktop. You can upload your own logo & favicon, customizable colors and background, 8 flat design theme color scheme, 3 different theme layout options, customize archive Posts (hide feature image, hide metadata and show post excerpt), single Post(hide feature image, hide related post and hide author box), and google fonts select for Customize: Body, Site Title, Heading, Sub-Heading. live the theme demo at http://www.wpbars.com/go/flatbox.

Flat Bootstrap

Flat Bootstrap by XtremelySocial is a modern, fully responsive, “flat” style theme with a nice color palette, big full-width images, and full-width colored sections. It automatically adapts for desktops, tablets, and phones. It is based on the WordPress standard starter theme (_S) and the Twitter Bootstrap CSS framework. Features include a mobile navigation bar, multiple columns (grid), buttons, icons, labels, badges, tabbed content areas, collapsible content areas, progress bars, alert boxes, carousels (sliders) and much, much more. This is a theme for both users and theme developers with lots of features but without the bloat. For a live demo go to http://xtremelysocial.com/wordpress/flat/. PLEASE NOTE: Version 1.9 has had a major “spring cleaning” of the functions, templates, and CSS. Please be sure to test it out on your site.

Flask

Flask is an elegant and highly configurable theme for bloggers with a clean, minimalist design that focuses on typography and compatibility with smartphones and tablets. It features AJAX page loading and comments, several custom page templates, the ability to include a logo in the header, and left-swipe menu access for mobile and touch-enabled devices. Through the WordPress customizer, users can configure fonts and font-sizes, page layout, social media integration, and more. Flask also integrates seamlessly with popular plugins including Contact Form 7, Jetpack Contact Forms, and the WooCommerce e-commerce package.