PrestaShop is professional e-Commerce shopping cart software that you can download and use for free. It is web 2.0 based and extremely lightweight, so it runs very fast even on a shared server.

Having a very powerful back-end, store admins can manage the inventory, orders, customers & payments easily. System never limits you as it supports unlimited categories, sub-categories & image pictures. Sub-admin users can be created with different permissions so when someone can only track the inventory another admin can be limited to processing the orders.
Prestashop Website: Click here to visit website

Latest Version: 1.2.4
Price: FREE

Featured Sites:
Bagatelles
Abiessence
Marcel Green

Contact Prestashop RESTASHOP
6 rue Lacepede
Paris, 75005
FRANCE

Ecommerce Templates provides a powerful shopping cart software solution integrating into the main HTML editors; Dreamweaver, Frontpage, Expression Web, GoLive and CSS layouts. It is also possible to use the Generic version with an existing design. Available for ASP / Access / MS SQL Server for Windows hosting and PHP / mySQL version for UNIX / Linux / Apache servers.
Ecommerce Templates Website: Click here to visit website

Latest Version: 5.8.1
Price:
$149 for the Generic version and $159 for all the other designs
The purchase comes with 6 months of free support and updates which can be renewed if required.

Example Sites:
Baby changing bags
Welsh gourmet coffee
LED Lights

Contact Ecommerce Templates:
ecommercetemplates.com is owned by Electronic Shopping Solutions LLC
410 Park Avenue, 15th Floor
New York 10022
USA
US Sales Phone: 1-718-887-7598
UK Sales Phone: 0141 416 3414

ViArt’s CMS is a PHP based Content Management System designed to make the creation and customisation of a dynamic e-commerce portal as simple and as flexible as possible. As well as full design controls using the dynamic page layout tool, the CMS enables users to customise site navigation, use WYSIWYG HTML Editor, Built-in Classified Ads and File Manager; activate RSS feed support, SEO friendly links; customise META data, hold single/ multiple choice opinion polls, and much more.

ViArt Shop Website: Click here to visit website

Latest Version: 3.4.7
Price:
Hosted: $49/month
Light: $149
Standard: $249
Enterprise: $349
Multiple license: $1,399

Refund Policy: 30 Day Money-Back Guarantee
Trial Version: 30 Day Fully Functional Hosted Trial

Featured Sites:
Office Supermarket
Toys Direct To Your Door
PSP World

Contact ViArt:
Viart Limited
Scotswood House , Teesdale South
Thornaby Place, Stockton-on-Tees
TS17 6SB England

Übercart is a complete, Drupal e-commerce solution. Check out the Übercart project page at Drupal.org. The developers of this fine looking piece of e-commerce goodness call it an escape from osCommerce. (Is it also an escape from Zen Cart – the previous osCommerce exit strategy?) The best news is that it is a collection of Drupal based modules – not a hack in – that will allow other great development options for an e-commerce website:
Content development
Several great options for ratings and reviews
Discussion forum
Community development
Flexible theming possibilities
The list goes on…
Uber Cart Website: Click here to visit website

Price: Free

Featured Sites:
Ben Simon
West Paw Design
Blue Point Security

Contact Uber Cart: Ubercart Forum

CRE Loaded is like Oscommerce but with many more contributions installed. Some of the nice contributions it has are Easy Populate which lets you populate your database from an Excel file, coupon codes, administrator access levels, template system, and an affiliate manager. CRE Loaded also has one of the Oscommerce templating systems installed which allows you to more easily integrate a design into the system and control which information boxes show on the left and right columns.

Pros
Many contributions from Oscommerce already installed

Cons
Contributions from Oscommerce.com can be more difficult to install, but CRE Loaded has many of its own already converted
Buggy code for some modules like multi vendor shipping

Price:
PCI CE Shopping Cart (Community Edition): FREE
PCI Pro Shopping Cart: $250
PCI B2B Shopping Cart: $416.50

Featured Customer Websites:
Essential Stuff
Mariner Parts
Viza Motors

Contact CRE Loaded:
CHAIN REACTION ECOMMERCE, INC.
112 Krog Street Ste. 19
Atlanta, Georgia 30307

Phone: 404.961.9840
Toll-Free: 800.609.2141
Fax: 404.645.7010

Visit Website: CRE Loaded

Zen Cart is a PHP/MySQL open source shopping cart. It is completely free, and comes with source code which you can freely modify. The software is developed by a community effort. The code is based on the popular osCommerce shopping cart. The goal of the Zen Cart project is essentially to make an easier to use version of osCommerce which can be installed more quickly, modified more easily and have a more usable configuration out of the box. Being a community effort, many of its users are very passionate about this cart, and are constantly developing add on modules.

Price: Free
Latest Version: 1.3.8

Featured Sites:
Floracopeia
Moissanite Co
Isabel Harris

Contact Zencart: Zencart Community Forum
Zencart Website: Click Here

CubeCart by Brooky.com, is an E–Commerce script written with PHP & MySQL. CubeCart is actually a free E–commerce Script that has their logo on the page. If you need to edit or remove the CubeCart copyright logo they charge $59.95 per domain and you will be issued with a License Key.

Cube Cart Website: Click here to visit website

Price:
Cube Cart V3: Free
Cube Cart V4: $129 – $179

Trial Version: FREE 30 Day Trial

Featured Sites:
Old Skool Motorcycles
TM Collectables
Brain Bucket

Contact Cube Cart:
Office Address: (Meetings/Visits by appointment only)
Devellion Limited
13 Ducketts Wharf,
South Street,
Bishop’s Stortford,
Hertfordshire. CM23 3AR
UNITED KINGDOM

Telephone: (for Sales & Billing enquiries only)
London, UK: 0207 183 5536
New York, US: 1-646-688-1327
Rest of world: +44 207 183 5536

Interspire Shopping Cart touts itself as being the most feature-packed easy-to-use shopping cart around. Formerly known as Interspire StoreSuite, the software package includes everything you’ll need to create, run, market and profit from your online ecommerce venture. Interspire is well known for development of products such as Email Marketer, Knowledge Manager and WebEdit, but the new version of their shopping cart promises to be a complete ecommerce solution right out of the box. Here’s a breakdown of the features included in Interspire Shopping Cart:

Store Design Templates
Drag and Drop Design Mode
Simple Shipping and Payment Gateway Integration
Multiple built-in inventory tracking options
The ability to sell physical or digital products
Fast page loads due to extensive AJAX programming
Variations of products each with unique pricing, stock, images, etc.
Integration of SendStudio and Knowledge Manager for email marketing and FAQs

Price:
Starter Edition $295
Professional Edition $995
Ultimate Edition $1795

Refund Policy: 60 day, no-questions-asked refund guarantee

Latest Version: Interspire Shopping Cart 5.0

Contact Interspire:
Interspire Inc
9606 N. Mopac, Suite 960
Austin, TX 78759
United States
sales@interspire.com
1800-939-5570

Inspire Website: Click here to visit website

osCommerce is an open source e-commerce solution under on going development by the open source community. Its feature packed out-of-the- box installation allows store owners to setup, run, and maintain their online stores with minimum effort and with no costs involved. You can easily install osCommerce on your website with the help of the Fantastico auto-installer. Although the oscommerce is not the “ultimate” e-commerce solution, it is by no means “basic”; with the capabilities of customizing to meet the specific needs of ones own business.

osCommerce Website: Click here to visit website

Price: FREE
Latest Version: osCommerce Online Merchant v2.2 Release Candidate 2a
Community Support: http://forums.oscommerce.com/

Magento Commerce is an open source eCommerce shopping cart platform brought to you by a company called Verian. The shopping cart is quite feature rich out of the box, and is positioned to be the de-facto standard for open source eCommerce platforms.

Pricing: $0 – $8,900/year
Magento Commerce comes in 2 flavors: The Community Edition which is available as a free open source download, and the feature rich Enterprise Edition which costs $8,900 a year.
Latest Version: 1.3.2.3

For further reading:

• Magento Commerce – A First Look
• Magento eCommerce Review: Platform Perils and Impressions, Three Months In
• The PeC Review: Magento is the Open Source Powerhouse
• 25 Magneto templates for your ecommerce business

Contact Magento:

http://www.magentocommerce.com/
11832 W. Pico Blvd. Los Angeles, CA 90064
Enterprise Sales
+1 (310) 594-7638 (N. America)
+44 20 3286 4137 (UK)