Twenty Ten

The 2010 theme for WordPress is stylish, customizable, simple, and readable — make it yours with a custom menu, header image, and background. Twenty Ten supports six widgetized areas (two in the sidebar, four in the footer) and featured images (thumbnails for gallery posts and custom header images for posts and pages). It includes stylesheets for print and the admin Visual Editor, special styles for posts in the “Asides” and “Gallery” categories, and has an optional one-column page template that removes the sidebar.

Twenty Sixteen

Twenty Sixteen is a modernized take on an ever-popular WordPress layout — the horizontal masthead with an optional right sidebar that works perfectly for blogs and websites. It has custom color options with beautiful default color schemes, a harmonious fluid grid using a mobile-first approach, and impeccable polish in every detail. Twenty Sixteen will make your WordPress look beautiful everywhere.

Tarski

An elegant, flexible theme with built-in display options and alternate styles. Tarski includes support for aside-style posts, comes with numerous default header images, and translations are available for over 20 different languages. It is extremely customisable, both by the usual WordPress mechanisms such as custom headers, backgrounds and menus, but also by its support for custom CSS files and an extensive, well-documented API that gives child theme and plugin authors a huge amount of control without needing to modify the theme’s files, making upgrading to new versions simple.