1ShoppingCart
Most people need a system that not only processes orders, but delivers their product(s), manages follow-up, provides customer service & relationship management, and gives them tools to mine their customer base for additional sales. 1ShoppingCart is the eCommerce platform that provides all aspects of eCommerce, not just order taking.
In case you are not familiar with it, eCommerce is the part of your project where you actually sell your product, collect money, communicate with your clients through auto-responders, and manage affiliate relationships.
We have been using 1ShoppingCart as our eCommerce platform for over two years and it is truly the best the market has to offer.
1ShoppingCart has the right combination of features so that you can use only one vendor rather than getting stuck trying to integrate several. You don't have to buy anything because 1ShoppingCart charges on a monthly basis with no commitment... and you can stop using them anytime you want.
1ShoppingCart cart has four different packages so you don't have to over-buy. Check them out if you are looking for a well designed eCommerce platform to handle the communication and financial end of your eProject.