What’s AspDotNetStorefront?
An effective e-commerce shopping cart must provide a wide range of features to allow you to effectively manage your online business. Nearly 10,000 customer sites and over 5,000 developers are using AspDotNetStorefront.
Features:

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Architecture support
x86 (32 bit OS support)
x64 (64 bit OS support)
Store management: Web Based
Provides complete web site solution, including shopping cart, content management, [...]

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What’s YetAnotherForum?
YetAnotherForum(YAF) is an Open Source discussion forum or bulletin board system for web sites running ASP.NET. The latest version is ASP.NET v2.0 with a Microsoft SQL Server backend. The full C# source code is available licensed as GPL.
YAF Features:

100% C# ASP.NET
Microsoft SQL Server 2000/2005 database [...]

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Microsoft SQL Server:
Microsoft SQL Server is a relational model database server produced by Microsoft. There’re 3 different SQL Server Version, Mssql 2000, Mssql 2005 & Mssql 2008.
What’s New in SQL Server 2008?

1.The Data Collector provides a convenient way to collect, store, and view performance [...]