http://umbraco.org
Umbraco is an Open source CMS based on Microsoft ASP.NET (C#). Ideal for the development of small to medium public websites. Very low licensing costs. Umbraco is much better than DotNetNuke and a thé ASP.NET alternative to Drupal (PHP).
Some features:
- Intuitive userinterface
- Microsoft Word integration
- Maintains a history of all modifications to a page (Versioning)
- Pland and schedule all your updates
- Medialibrary
- Notifications and tracking
- Multilingual
- No high licencefees
- Easely extended and integrated with custom ASP.Net development