Presstopia

Presstopia Blog is a standalone, open source weblog application that runs on the ASP.NET platform. The software is 100% free of charge, and licensed under an Apache Open Source License. It includes all the features you need to run a great blog, without the clutter and clunkiness so often associated with other high-end blogging applications.

Features:
- Support for Atom 0.3 and RSS 2.0 feeds     
- Comments and Trackbacks (send and receive) with spam protection    
- Support for Trackback AutoDiscovery    
- Uses FreeTextBox for WYSIWIG post editing and image uploading    
- Separate template files for easy customization of the look and feel    
- Separate language files for easy translation    
- Update ping notification to the RPC server of your choice    
- Supports multiple authors, each with access restricted to their own posts    
- Email notification of new comments and trackbacks  
- Open source (Apache License)

Go to http://presstopia.com/dnn/Default.aspx?tabid=160

See also these related projects.