Automattic

WooCommerce

WooThemes

James Koster

Tiago Noronha

A simple plugin that adds an attractive sharing component to product pages. Prompt visitors to share your products on Facebook, Twitter, Pinterest or via Email.
This plugin requires the Storefront theme and WooCommerce plugin to be installed.

Storefront Product Sharing

Add attractive social sharing icons for Facebook, Twitter, Pinterest and Email to your product pages.

Wombat Plugins

studiowombat

This lightweight plugin adds a bottom bar on mobile devices, like on the StoreFront theme.
FEATURES 
 * The bar links to your cart page. 
 * Allow searching products from the bar. 
 * Link to you account page. 
 * Change the design’s colors. 
 * The cart icon updates when a product is added to cart.
REQUIREMENTS 
* PHP 5.4 or higher 
* WordPress 3.7 or higher 
* WooCommerce 3+

WooCommerce Bottom Bar for Mobile

This lightweight plugin adds a bottom bar on mobile devices, like on the StoreFront theme.

Storefront Product Sharing vs WooCommerce Bottom Bar for Mobile