CataLook
A complete easy-to-use and search engine optimized shopping cart - ecommerce solution includes multi language support, real-time delivery of digital goods, subscription management, recurring billing, inventory tracking, 20+ credit card payment gateways. multiple stores can share the same database. renting / letting system, ticket counter, product configurator and subscription management with recurring billing. multi-vendor mode allows multiple product providers (vendors) to share a single store
http://www.dnnsoft.com/
Portal Store
Portal Store
http://www.dnn-modules.com/default.aspx?tabid=92