Aivea eShop - An ASP.NET E-Commerce solution. [Open source, commercial] - http://www.aivea.com/eshopinfo.htm
ArchCommerce ASP.NET eCommerce Framework - A scalable business-to-consumer (B2C) application that has advanced backoffice suites that allow manage product catalogs and ensure on-time delivery of products. Commerce Framework supports multi-languages. - http://www.archcommerce.com/