WooCommerce

WooCommerce is a free plugin that lets you transform your Wordpress blog into a completely customizable online store. The only requirement is that you have to host the website yourself, instead of having it hosted by Wordpress.

Once the plugin is installed and activated, you'll have access to a backend from the blog's admin menu, where you'll see two new categories. From the products menu, you can create entries for each item on sale, upload images and descriptions, and organize everything into categories. The WooCommerce submenu will allow you to configure all aspects related to the sales process and payment system.

It should be noted that WooCommerce requires a visual theme that will accommodate its characteristics. WooThemes, developer of this e-commerce tool, offers many free templates that you can customize and download from the official website.

The setup process is easy and quick, and thanks to its extensive additional documentation and the system's ease and versatility, you can create an online store quickly and easily, so long as you have the most basic of Wordpress skills.