Automattic

WooCommerce

WooThemes

James Koster

A simple plugin that adds a full width widget region above the default, columnised Storefront footer widget area. Customise the display by adding a background image and tweaking colors via the Customizer.
This plugin requires the Storefront theme to be installed.

Storefront Footer Bar

Add a full width widgetised region above the default Storefront footer widget area.

Tiago Noronha

A simple plugin that turns the default handheld navigation into an off-screen sidebar menu with a “hamburger” toggle.
This plugin requires the Storefront theme to be installed.

Storefront Hamburger Menu

I bought homestore theme recently and installed this plugin but it failed miserably so I deleted this plugin. Too bad Woocommerce doesn't provide technical assistance for this plugin. 

Doesn't work with Homestore theme

Storefront Hamburger Menu turns the default handheld navigation into an off-screen sidebar menu with a "hamburger" toggle.

Storefront Footer Bar vs Storefront Hamburger Menu