GetShopped is a free WordPress plugin for adding e-commerce capabilities into WordPress-powered websites.
It is a very easy-to-setup plugin which can work with any standards compliant WordPress theme (and WordPress MU).

The plugin offers a flexible pricing structure for products with features like:

flexible coupon/discount pricing rules
product specific sales
quantity discounts
free shipping options
multi-tier pricing for quantity discounts

and supports multiple [...]

nopCommerce is an open source shopping cart software that is built with ASP.NET & uses MSSQL for storing the data.
It comes with a powerful backend & highly customizable frontend.

nopCommerce has all the features of a standard e-commerce websites & offers more like:

support for kit products (e.g. build your own computer)
real-time currency exchange rates
[...]

Today i list Most Famous and hot Free of cost Shopping cart solutions. With the shape of the economy and ever changing gas prices, online shopping may end up growing even faster than some have predicted. If your business hasn’t added an online shopping cart yet, why not?  The technology has been around for years [...]

Tutorialzine is sharing a beautiful tutorial (with source) on creating an Ajaxed drag’n drop shopping cart with jQuery & PHP.
It uses MySQL for storing the data & simpleTip plugin for displaying information about the products with style.

It takes advantage of the jQuery UI’s draggable & droppable behaviours to accomplish the flawless experience.

CS-Cart is an “out of the box” ecommerce software solution with easy-to-use functionality that allows to start selling online immediately. Its feature set fits into businesses of any size, from a small single-product shop to a fully-featured online storefront.
Designed for ease of use along with flexibility, CS-Cart is equipped with the latest ecommerce innovations (like [...]

It is a clear fact that Ajaxed interfaces, if not overused, eases using websites so much.
For an e-commerce website, this can mean a better shopping experience for customers where they can concentrate more on the products which may result in better sales.

This is a detailed tutorial which shows creating an unobtrusive Ajaxed shopping cart using [...]