Simvance

Simvance is a Minimal Responsive theme with Plenty of premium features including Numbered page navigation, Responsive Slider, Customizable Header & Footer, Custom Widgets, etc. Simvance also has a powerful admin options panel, which lets you modify your site to a great extent.

SimplyBlack

SimplyBlack is a free, clean, minimalistic, responsive, mobile friendly WordPress theme. Features: sidebar, widget areas in footer, custom header image, custom background, custom logo to replace blogname and description, full width page template, dropdown navigation. Enjoy.

Simply Jigoshop

Simply Jigoshop (former Jigotheme) is a clean and simple theme designed specifically for Jigoshop. It features a custom AJAX dropdown shopping cart in the header, custom menu areas for product categories / standard pages and a custom widget for displaying banners and other eCommerce specific content. There are 8 colour schemes each of which are selectable from the WordPress Customize. Best of all Simply Jigoshop has been optimised for use on a wide variety of mobile devices from netbooks to tablets and smartphones.

Simpleo

Simpleo is a modern, clean and fully responsive WordPress theme that looks perfectly on any device. Theme is packaged with a lot of awesome features such as: fully responsive design, admin panel, super easy installation and setup, custom background, custom logo and favicon, blog post formats, eCommerce support via WooCommerce, Translation ready, Google Fonts, unlimited colors, 2 amazing sliders, advanced blog options, font awesome integration, social icons and more.

Simple Shop

Simple Shop is an easy to use storefront for your WooCommerce business. Display your products in a simple, clean, and modern layout. Simple Shop supports a custom homepage, archive pages, and blog posts. This theme is responsive, leverages the front-end Customizer and yet it’s lightweight. Now supports live front-end text widget editing via Note. More info – http://wordpress.org/plugins/note/.

Simple Portal

A WordPress child theme for Twenty Thirteen that uses Twitter Bootstrap 3.0. Makes all BuddyPress and BBPress pages use full width page. Also has custom menus for different user level menu visibility. A little menu in the top right is available when a user is logged in that shows buddypress links for users such as profile, messages, groups, log out.