NopCommerce is based on ASP.NET4.0 v3.20 source code version

nopCommerce is a fully customizable shopping cart. It's stable and highly available. nopCommerce is an open source e-commerce solution based on ASP.NET 4.0 and Microsoft's SQL2005 (or higher) backend database. Our easy-to-use shopping cart solution is unique for merchants who have outgrown their existing systems and can be hosted with your current web host or one of our partners. It has everything you need to get started selling physical and digital goods on the Internet.

nopCommerce3.20 source package update log:
•Performance optimization.
• "Facebook Store" plug-in added. It helps store owners showcase their product stores on Facebook. Note: Currently this plugin only supports catalog browsing without product details or shopping cart pages. This is to reduce source code duplication. If someone wants to extend this plugin then he can do it easily.
• Warehouse support added. Also let the store owner decide whether the system should or should not require the warehouse location to be used when shipping. This is useful when you ship from multiple warehouses.
•Allows store owner to configure and specify delivery date (product). The specified delivery date will appear on the product details page.
• Default theme for better user interface. Now it comes with categories and new footer top menu.
•Multiple suppliers. Front page navigation support is added.