Free shopping cart software for linux

Zen Cart truly is the art of e-commerce; a free, user-friendly, open source shopping cart system. Zen Cart software is being developed by group of like-minded shop owners, programmers, designers, and consultants that think e-commerce could be and should be done differently.
Some "solutions" seem to be complicated programming exercises instead of responding to users needs, Zen Cart puts the merchants and shoppers requirements first. Similarly, other programs are nearly impossible to install and use without an IT degree, Zen Cart can be installed and set-up by anyone with the most basic computer skills. Others are so expensive ... not Zen Cart, its FREE!
Zen Cart will deliver the ultimate online shopping experience to your customers. Navigating through your merchandise offerings is a breeze with Zen Cart, the program provides several "Spotlight" lists in addition to the traditional category to product links. Once a product is added to the shopping cart, secure checkout is a simple 3-step process.
After providing the billing information, your customer chooses the shipping method. (multiple shipping methods including real-time internet shipping quotes are built-in) Next, a payment type is chosen from one of the popular payment modules. (PayPal and AuthorizeNet are just 2 of the included modules) Last, the customer reviews the order, shipping and payment choices, and confirms the order.
You are immediately notified of the order and your customer automatically receives an e-mail confirmation.
Zen Cart addresses many of the goals we set:
- make the program easy to set up
- make it easy to customize
- automate tasks, such as order confirmation
- make navigation simple
- built in promotions; discount coupons, gift certificates, newsletters and product notification
- offer single item specials and storewide discounts (group discounts and quantity discounts - Coming in future editions)
- built in Search Engine Optimization tools
- password protect the Administration Tool (administration "levels" - Coming in future editions)
- support multiple languages, currencies and tax structures
- In short, Zen Cart is shopping cart software the way it should have been all along.
Zen Cart gives web designers a robust and customizable electronic storefront thats easy to keep up-to-date with new features.
It provides usable, intuitive and unobtrusive purchase flows right out of the box based on proven industry best-practices - there are no major revisions required to get things right for your clients!
One of the secrets behind its power lies in our robust template system that "abstracts" the look-and-feel from the code and logic behind Zen Cart. This enables you to give clients a truly custom solution that integrates quickly and perfectly with their existing marketing websites.
Developers are able to deploy cutting edge solutions based on Zen Carts modern standards and technologies. Combining PHP server-side technology with the ability to choose from multiple databases on the back end (coming in future editions, thanks to ADOdb), results in flexible software that you can customize and modify to suit your needs. Minimum/suggested server requirements: PHP 4.1.x or higher (PHP 4.3.3+ for optimal performance), Apache 1.3.x and MySQL 3.2x.x or higher.
Enhancements:
- Two vulnerabilities related to cross site scripting (XSS) have been fixed.
- Officially certified for Paypal Express Checkout (only for North American Paypal accounts as of 20070101).
- Also includes several minor improvements and bugfixes.

Webforce Cart (wfCart) is a free PHP shopping cart class you can use a component of a PHP based online store. Its designed as a component for PHP developers who would rather write their own store rather than a complete solution.
Instructions and examples for the free PHP Shopping Cart
To use the cart in an existing script:
Rename wfcart.php.txt to wfcart.php and upload to your server.
Then include the file:
include("wfcart.php");
Start the session, and assign the cart to it. NOTE: You must include the file wfcart.php before you start the session, its just the way PHP works.
session_start();
$cart =& $_SESSION[cart];
if(!is_object($cart)) $cart = new wfCart();
Then you can use the functions like $cart->get_contents();, these functions are documented below.
Adding an Item - $cart->add_item( code , quantity , price , info )
If you have a widget with code AB313 and a price of $40.11, you can add it to the cart with :
$cart->add_item(AB313,1,40.11,Widget AB313 Standard);
If the item AB313 is alreay in the cart, then the quantity of it will be increased by the quantity supplied to the function, in this case 1. The itemid must be unique, and can be letters and/or numbers.
Deleting an Item - $cart->del_item( itemid );
E.g. to delete the item ID 123
$cart->del_item(123);
Changing the quantity of an item -
$cart->edit_item( itemid, new_quantity );
For example :
$cart->edit_item(HA2,3);
If you set the quanitity to zero, the item is deleted.
Getting the number of items in a cart
echo $cart->itemcount;
Getting the total value of the cart.
echo $cart->total;
Emptying the cart
$cart->empty_cart();
Getting the cart contents
$items = $cart->get_contents();
$items is an array, so the following code displays the items.
foreach($items as $item) {
echo "Code/ID :".$item[id]."
";
echo "Quantity:".$item[qty]."
";
echo "Price :".$item[price]."
";
echo "Info :".$item[info]."
";
echo "Subtotal".$item[subtotal]."
";
}
Note, subtotal is quantity X price for that item, not a running total..
Extending Webforce Cart
There are 2 functions you can create that will enable more flexability.
One is wf_get_price( itemid, qty ). If you need to do pricing based on Quantity ( e.g. bulk discounts ) then you can create a function called wf_get_price to do what you need itto do. If you do not pass a price to add_item, then the wf_ get_price function will be called. If you use this functionality, AND your price is quantity dependant, then you must uncomment the line in the edit_item function.
The other is wf_get_info, again, if you do not pass info to add_item then get_info will be called. TIP: you do not have to pass a string to add_item(), you could use an array of infomation instead. e.g. add_item( AS2112,5,19.95,array(size=>large,color=>red)); then when you use get_contents, you echo $item[info][color] etc.
Enhancements:
- The empty cart function was fixed.

PgMarket is an E-Commerce Solution based on PHP 4 and PostgreSQL/MySQL.
It is released under the terms of the GNU GPL (General Public License).
All its pages are HTML 4.01 Transitional valid documents, and the CSSs are valid CSS 2.0 documents; full usability and accessibility is provided also if JavaScript is disabled on the client browser.
Main features:
- PostgreSQL (>= 6.5) and MySQL 3.23 support, and easy portability to other DBMSs
- multiple languages support (i18n)
- advanced images and thumbnails handling; possibility of on the fly generation of thumbnails of full size images; possibility of storing images and thumbnails in the DB instead of on the file system
- easy customization of many look elements through .css files
- HTML-only templates, not containing PHP code
- a simple and an advanced search engine
- products are organized in categories and subcategories of arbitrary level; each product can belong to more than one category; products and categories are shown ordered by their respective "special level" values
- comfortable category browsers (the PHP Layers Menu system is used)
- support of per-user and per-product discounts
- delivery price based on the delivery zone and on the total shopping cart weight
- possibility of disabling many features through the configuration file, without modifying scripts and templates
- mailing of the orders, and storage of all the orders in the database
- order states handling
- ability for the customers to track their orders states and logs
- ability for subscribed and non subscribed customers to contact the store without buying anything, through a suited contact form
- splitting in sub pages for pages that show a large number of items
- easy customization of the currency and of the weight unit
- comfortable web based administration interface: the web shop is easily built up simply through a browser; the "web shop root" can insert categories, as well as insert, edit, and delete products also while browsing the catalog
- possibility of importing data from text files easily obtainable through a spreadsheet
- possibility of off-line filling of the shop and subsequent on-line synchronization of data and images/thumbs, also between etherogeneous platforms, i.e. between PostgreSQL and MySQL and between Unix and MS Windows, in both directions

ViArt Shop is a Customizable Ecommerce PHP shopping cart software coming with Shopping Portal Extension, multiple layouts support and with advanced set of Sales Mechanisms (Products reviews and ratings, Discounts mechanism, Shipping and Stock mechanisms, etc), Web-based Administration with Order Maintenance, Product Maintenance, User/Shopper Maintenance, Vendor Maintenance, multiple payment processing capabilities (including support of Verisign, Authorize.net, Worldpay payment systems and more).
This ecommerce solution supports MySQL and PostgreSQL databases as well as ODBC connected databases.
Package includes additional applications: Events, News, FAQ, Support Heldesk System and Forum. The set of these applications and the highly-customizable Shopping Portal Extension allows creating complex Shopping Portal in no time!
Main features:
- No need for programming at all!
- Two-steps installation routine.
- Buy two integrated applications by the price of one: PHP Shopping Cart and Shopping Portal.
- Template-based system
- Multilingual interface
- Coupons
- Enterprise version comes with two more bonus applications: Support Helpdesk System and Forum integrated within one powerful Shopping Portal.

CartStart is a shopping cart project in three parts. The first part is a set of Web pages with products containing JavaScript for updating prices, logging into a cart server, and more.

The second part of CartStart is a server that acts like a chatroom for passing detailed product information to a shopping cart client, which resides with the user.

The third part is the shopping cart client, which keeps a list of product selections from different Web sites, Web bookmarks, the balance, etc. The purchase descision is made by the shopping cart client.

The C++ is STL and standard. By using Common C++ from Open Source Telecom, the basic server software is cross platform.

I have attempted to keep all of my extensions cross platform as well.
I could use some help with testing it out on more than one platform. So, if youre out there.

The Browser software, JavaScript and PHP, works in Mozilla and Explorer. I have this requirement for all of my development, anyway. The browser interface is for example. There is yet to be a detailed application.

However, if you would like to pursue using it, all the necessary code is there for expanding to larger applications. The PHP needs to have Sockets enabled.