The main objective of the project was to develop a flexible and easy-to-use system for promoting and selling goods using Web-services. The system embraces the payment gateway system capable of processing various payments such as electronic cards, Paypal, Stormpay, Google Checkout etc. and the marketplace and the affiliate system to promote and sell products. The solution combines the most successful elements of such systems as clickbank.com, www.paydotcom.com and www.2co.com to provide the users with a full range of merchant services and advanced promotion and tracking tools.