DotNetNuke is a Windows based Web Application Framework ideal for creating and deploying projects such as commercial web sites, corporate intranets and extranets, online publishing portals, and custom vertical applications. It is designed to make it easy for users to manage all aspects of their projects.
It can support multiple portals or sites off of one install. DotNetNuke comes loaded with a set of built-in tools that provide powerful pieces of functionality. Site hosting, design, content, security, and membership options are easily managed and customized through these tools.