NET Compact Framework - This section of the MSDN Smart Client Developer Center contains links to articles and product information focused on creating Smart Client applications using the .NET Compact Framework. - http://msdn.microsoft.com/netframework/programming/netcf/
Code Project - CF - The part related to the Compact Framework providing free source code and tutorials. Sample applications, controls, game development and general topics are handled. - http://www.codeproject.com/netcf/
Ward.nu - A short introduction into compiling Pocket PC applications without Visual Studio.NET. - http://www.ward.nu/computer/teletekst/compile.html
Compact Framework QuickStart Tutorial - Provides guidance in a variety of areas of CF programming and also techniques and workarounds for situations when code for the full .NET Framework cannot be used in a device application. These QuickStarts also demonstrate classes specific to .NET Compact - http://samples.gotdotnet.com/quickstart/CompactFramework/
OpenNETCF - Home of the Smart Device Framework which enriches and extends the .NET Compact Framework by providing a rich set of classes and controls not available in the CF. Provides news, articles, forums and projects related to the .NET CF.[Open Source] - http://www.opennetcf.org/