Qarib Haider

This plugin adds a QR Code for each post (link) published on the site. The plugin support all the registered built-in and custom post types, along with pages, this can be changed under the settings page of the plugin.
<h3>Settings</h3>
Following are the available configurable options in the plugin
 Option 
 Default Value
 Size 
 300 pixels
 Margin 
 20 pixels
 Image Type 
 PNG
 Post Types 
 [All Available Post Types]

Link QR Code

Add a QR code to each post, page and custom post type

intelligence_lab

Scanventory is an innovative suite of tools to help manage and maintain inventory control of your WooCommerce store. Free yourself from the toils of inventory control with Scanventory, the scannable, mobile, inventory manager for your WooCommerce store.
Features include
<ul>
<li>Mobile inventory control</li>
<li>Detailed stock reports</li>
<li>Custom label design and printing</li>
<li>Detailed stock reports</li>
<li>Restock cancelled/refunded orders</li>
<li>Inventory Control Audit Trail</li>
</ul>

Scanventory

I will defiantly buy pro version to use all features.

Great Plugin

Quick mobile inventory scanning and management solution

Link QR Code vs Scanventory