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)