I know nopCommerce and dashCommerce quite well, but I so far have never found any open source shopping cart (including HumanResources and Vendors) bigger than the nopCommerce.
I'm wondering whether AdventureWorks database comes together with a web project or other UI projects as an open source. Or it just exists as a sample database only.
Thank you for your comments!
AdventureWorks is purely database goodness. The closest you would come to to a ASP.Net web project with UI would be the samples delivered with Access 2010 like the "Assets web database". It does not compare well to dashCommerce or nopCommerce though.
There is a sample Web UI (ASP.NET Web forms) available with the database samples download (2005 and 2008). There is also a site dedicated to building out a real world example, but it doesn't look like they are sharing a code download: demo.componentone.com/ASPNET/AdventureWorks/