OmniPortal was built on the idea of having a web-portal-kernel, that could handle security, themeing, and localization. This means that you can create any web based system on top of OmniPortal (i.e. ERP, CMS, CRM) easily. Mono and .Net is supported.
Praetorian is extremely fast,ultra flexible and reliable Content Management System (CMS).Easy to deploy,manage,update and backup.Written for .NET 2.0 in C#. Provides multi-language support, automatic browser recognition and profiles (IE,Mozilla,PDA,WAP).
x3blog is multiuser weblog system,based on xml/xsl and ajax of browse,DIV+CSS layout measure up web2.0,written in ASP.NET(C#), many database be supported,Lucene.net 2.1 and optimize chinese analyzer by the fulltext search engine. http://blog.muchool.com