Codeplex - Microsoft's community development web site. Offers room for new projects to share with other developers, allows to join others who have already started their projects, or use the applications present and provide feedback.
DavidYardy - Developer resources, code and tips supporting Microsoft Technologies. Daily/Weekly web log of useful tools and tips. Rss new aggregator for a number of .Net related rss sites.
Developer Fusion - .NET Zone - ASP.NET, C# and VB.NET tutorials and source code, books, covering a wide range of topics, and .Net components.
Dotnet4all.com - A .NET Portal for C# and VB.NET developers.
DotNetCoders - Articles, resources, and study guides around the .NET platform and the VB.NET and C# languages.
DotNetJunkies.com - Tutorials, news, sample code, user contributed code and web services directory.
DotNETWired.com - Microsoft .NET news, resources, forums, and code samples.
GotDotNet - A .NET Framework Community Website. Blogs, FAQ, Message Boards, Resource Center, User Directory, User Samples, Workspaces.
KnowDotNet - Offers tips, tricks, and tools for development using the Microsoft .NET Framework.
.NET Monster - Articles, discussions on ASP.NET, VB.NET, C#, and other .NET related technologies. Directory of open source .NET projects.
.NET This! - Dedicated to .NET programming and security; hosting articles, blogs, sample applications and source code in C# and other .NET languages.
Nexus6Studio - Resources for developers focused mainly on ASP, ASP.Net, SQL, and XML.
OdeToCode - A collection of articles, code snippets, and links to ASP.NET, C# and other Microsoft Technologies
ProjectThunder - A .Net, ASP.Net and VB.Net resource for developers in e-commerce, CRM and SharePoint.
SuperDotNet - Provides new articles and tutorials, discussion groups, categorized references, the C# language specification online, and a link search engine resource for .NET developers.
VSJ.NET - Information from a software development perspective; articles, book reviews and links.
XML Me - Has three main themes. The first is XML Web Services and related standards such as SOAP, WSDL, and UDDI. The second is using XML with the .NET Framework classes. In addition, XML Me is focused on expanding the scope of XML based applications to include mobile devices and other new hardware alternatives.
Ziff Davis DevSource - News, advice and resources for the enterprise application developer and application server programmer working with Visual Studio .Net . From Ziff Davis Internet, publishers of eWEEK.com.