WordPress
WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time. We can customize themes and plugin for your blog or web portal which will be managed by the wordpress amdinistration section.

MojoPortal
Separation of database concerns is one sign of a well architected project, and whilst I can’t personally vouch for the code, it looks like one to keep an eye on. They have a focus on creating standards compliant frontend HTML, and for that reason, they get my thumbs up. Both Rainbow Portal and DNN tended to create code which was very heavily table based, which lead to skinning difficulty. This seems to have been addressed within Mojo Portal.

Oxite
Oxite (alpha) is an open source, standards compliant, and extensible content management sample that can run anything from blogs to big web sites.

BlogEngine.NET
BlogEngine.NET is an open source .NET blogging project that was born out of desire for a better blog platform. A blog platform with less complexity, easy customization, and one that takes advantage of the latest .NET features.