nopCommerce is a popular open source e-commerce solution built on the top of latest ASP.Net MVC 4.0 with MS SQL 2005 or higher as database backend. It has all the features that any modern e-commerce site will need.
Compared to other open source e-commerce solutions, nopCommerce’s project structure is very well-organized and easier to customize and extend. It is extremely powerful and flexible yet very easy to use.
nopCommerce is among the top 5 featured apps (only e-commerce app featured on top 5) on Microsoft Web Matrix, downloaded more than 395,000 times from there and witnessed more than 883,142 source code downloads from Codeplex.
nopCommerce 3 Review
nopCommerce is gaining popularity & momentum faster than ever before. And with the recent release of nopCommerce with multi-store and multi-vendor features, nopCommerce is the only open source e-commerce platform that has multi-store and multi-vendor support. Yes, you read it right! nopCommerce is the only fully open-source e-commerce platform that support multi-store and multi-vendor features. No other open-source shopping cart software has it available out of the box.