Bridge the gap between you and your customers, Build your E-commerce Store with FREE E-commerce tools/software listed below:

blinkcart - BlinkCart is an online service that enables you to easily add a shopping cart feature into anywhere that supports html links or javascript code. e.g. your websites, blogs, emails, MySpace, MSN (the list goes on).

ecrater - eCRATER.com is both a free web store builder and a free online marketplace. Sellers can easily create their own free online store in minutes.

e-junkie - Helps you to build Shopping cart for selling downloads and tangible goods with PayPal, Google Checkout and Authorize.Net.

Yahoo Small Business - Yahoo! Merchant Solutions includes ecommerce features like easy design tools and secure shopping cart.

fortune3 - FORTUNE3’s expert team has brought together all of the E-commerce tools you need to create and manage a successful online store into our easy-to-use shopping cart software.

flyingcart - Online store hosting that’s free, accepts all major credit cards, and is search engine optimized.

1shoppingcart - Offers online Shopping cart software with automatic responders and ad tracking.

kagi - KAGI offers a complete range of store solutions, including order pages, shopping carts and payment processing all tailored to fit your needs.

erol - Shopping Cart Software solutions in one whole package.

near-time - Enables users to create their own commercial marketplaces and create as many collaborative marketplaces as they would like, each with different pricing, designs and services.

1automationwiz - Easy to use ecommerce automation, online shopping cart, and email follow up software with 30 day Free Trial.

ushops - Online marketplace to buy and sell stuff, helps in setting up E-commerce store for free. Free account lasts for 6 months only.

phpmycart - Online Shopping cart software with powerful php shopping cart script, Download online shopping cart Free Trial version.

vendio - Enables managing your free store, eBay, Amazon and more with 60 day FREE trial.

fastcommerce - Free easy to use secured shopping cart software.

volusion - Volusion’s user-friendly ecommerce software gives you the power to start, grow and manage your online business with ease. 

Merchant-in-a-Box - E-commerce Store Builder providing everything required to build online store for free 30 day trial.

.
These tools generally allows to host the shopping cart software on their web server only rather than making them to work on your website and offers limited features to the e-commerce store.
.

"To avoid dependency on such softwares or tools and get the customized e-commerce store with complete control, Website owners most of the times prefer to have their own e-commerce store."

.
For Customized E-commerce Store on your own website:

.
oscommerce - Open Source Online shop E-commerce Solutions.

prestashop - Wonderful Free Open Source E-commerce Software for Web 2.0.

Custom E-commerce Development - Hire Dedicated Developer and set up your customized store in your own style on your own website built in PHP, Joomla, X-cart, Zencart, OScommerce, ASP, ASP.net, Ruby on Rails or other popular applications.

ubercart - An exciting open source e-commerce package that fully integrates your online store with Drupal, the leading open source content management system.

zen-cart - Zen Cart truly is the art of e-commerce; free, user-friendly, open source shopping cart software.

virtuemart VirtueMart is an Open Source E-Commerce solution to be used together with a Content Management System (CMS) called Joomla! (and Mambo).

Ruby on Rails - Open source web framework optimized for sustainable productivity.

dashcommerce An ASP.NET Open Source e-Commerce Application

x-cart - PHP shopping cart software & ecommerce solutions.