Source of some critical tools help run your business on the Internet. Some E-commerce tools are free but there could be catch in it. You choose!
A free open source e-commerce platform robust enough to build your entire online storefront. The catch: you'll need some programming skills to get it up and running.
PayPal Shopping Cart/Merchant Account
The payment processing company offers a free shopping cart bundled with a free credit cart account. (Of course, if a shopper makes a purchase on your site, you'll be charged a percentage of the total and a transaction fee.)
Mal's free shopping cart is popular and easy to use, and has likely prompted many users to upgrade to Mal's $8 a month premium service. You'll need to supply your own credit cart merchant account with the cart.
Vstore (for "virtual store") provides everything for a budding merchant: the products, the merchant account, the Web site. It's all free, but it's all completely controlled by Vstore. Merchants earn a modest commission on sales.
A statistics package to help users of Google's popular pay-per-click service manage their campaigns. Monitor your campaign without needing to login to Google.
ViArt Shop Sequoia Open Source ERP 0.8 AFCommerce Shopping Cart 2
A shopping cart and content management system (CMS), along with an integrated help desk. This free version has database restrictions.
This is a Java application, compatible with major operating systems. It's designed to manage an integrated e-commerce, inventory and supply chain infrastructure.
An open-source store building program. Along with the free storefront software, the company offers its development services, which is presumably how they make money.
Sequoia Open Source ERP 0.8
AFCommerce Shopping Cart 2