Automattic

WooCommerce

Rynald0s

WooThemes

Tiago Noronha

A simple plugin that adds custom “Contact” homepage section to Storefront. Customise the display by adding your contact details via the Customizer.
This plugin requires the Storefront theme to be installed. Jetpack is required for the contact form.

Storefront Homepage Contact Section

There is no way to put the captcha, put extra plugins do not work. And without captcha there is a lot of spam, I do not advise you to install this plugin

Lots of spam

Add a "Contact" section to the Storefront homepage.

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 Homepage Contact Section vs WooCommerce Bottom Bar for Mobile