WebPeddle 
Application implented on an existing site. Supports linking to ImagineNation credit card processing service.
http://webpeddle.com/EZ-Powercart
Free application from company offering hosting services and other freebies.
http://www.ez-powercart.com/
eButtonz
Application for building online store. Same day setup. Free version has vendor advertisements.
http://www.ebuttonz.com/index.html
Mal's Ecommerce
Remotely hosted system that can be built into any existing web site.
http://www.ait2000.com/
VIPcart.com
Same day setup on free service. More advanced features on VIP service that's available for fee.
http://vipcart.com/
eComPal
Free service available with varying higher monthly cost options also. Works with QuickBooks.
http://www.ecompal.com/
Interchange
Open source alternative to commercial commerce servers and application server/component applications.
http://www.icdevgroup.org/
