The wpStoreCart plugin advertises itself as

The next generation of WordPress ecommerce. Easy to use & fully customizable, it’s the store front of the future; today.

There is also a wpStoreCart PRO

Description

wpStoreCart is a free, open source, and full featured e-commerce platform built atop of WordPress. It is easy to use, lightweight, heavily supported and constantly updated with new features.

I tried it on www.twenty-tenners.com

Installation

1. I installed wpStoreCart version 2.2.8
2. It offered a Setup Wizard saying

wpStoreCart is almost ready! Configuration required. The easiest and best way to configure wpStoreCart is to click here to run the Setup Wizard. You can also automatically create a “main page” and a “checkout page” for your store by clicking here, or you can create your own pages first & then visit the settings page to specify which pre-existing pages to use. See this help entry for more details.

Configuration

Easy using the Setup Wizard

Comments

1. Nice to see the store cart overview in the Dashboard
2. I was able to create my products and place an order, paying through PayPal.
3. I didn’t configure shipments since the basic functionality only supports the US Postal Service

Conclusion

I’d use this for simpler sites.